From 5e7e8ff2b1a4282efc87539f4775df6ed4411d73 Mon Sep 17 00:00:00 2001
From: houseme <housemecn@gmail.com>
Date: Sat, 5 Sep 2026 14:26:45 +0800
Subject: [PATCH 1/3] Improve Snappy CRC32 with crc-fast

Replace the optional crc32fast dependency with crc-fast 1.10.0 and use its CRC-32/ISO-HDLC helper for Snappy block checksums. This keeps the Avro trailer format unchanged while allowing the checksum path to use crc-fast's SIMD-backed implementation.

Bump the workspace and CI MSRV to 1.89.0 because crc-fast 1.10.0 requires Rust 1.89.

Co-Authored-By: heihutu <heihutu@gmail.com>

Co-Authored-By: zhi22915 <qiuzgang@gmail.com>
---
 .github/workflows/test-lang-rust-ci.yml |  2 +-
 Cargo.lock                              | 54 ++++++++++++++++++++-----
 Cargo.toml                              |  2 +-
 avro/Cargo.toml                         |  4 +-
 avro/src/codec.rs                       | 19 ++++++---
 5 files changed, 62 insertions(+), 19 deletions(-)

diff --git a/.github/workflows/test-lang-rust-ci.yml b/.github/workflows/test-lang-rust-ci.yml
index b9c7f226..6befde6e 100644
--- a/.github/workflows/test-lang-rust-ci.yml
+++ b/.github/workflows/test-lang-rust-ci.yml
@@ -54,7 +54,7 @@ jobs:
         rust:
           - "stable"
           - "nightly"
-          - "1.88.0" # MSRV
+          - "1.89.0" # MSRV
         runner:
           - name: ubuntu-24.04
             target: x86_64-unknown-linux-gnu
diff --git a/Cargo.lock b/Cargo.lock
index b91f0005..20b2b92c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -53,9 +53,9 @@ dependencies = [
  "bigdecimal",
  "bon",
  "bzip2",
- "crc32fast",
+ "crc-fast",
  "criterion",
- "digest",
+ "digest 0.11.3",
  "hex-literal",
  "liblzma",
  "log",
@@ -299,12 +299,13 @@ dependencies = [
 ]
 
 [[package]]
-name = "crc32fast"
-version = "1.5.1"
+name = "crc-fast"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8498c871161e1742aaa9d52551b2d6ebdd4c3d45a3be423e3728f33b955be550"
+checksum = "e75b2483e97a5a7da73ac68a05b629f9c53cff58d8ed1c77866079e18b00dba5"
 dependencies = [
- "cfg-if",
+ "digest 0.10.7",
+ "spin",
 ]
 
 [[package]]
@@ -346,6 +347,16 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
 
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "crypto-common"
 version = "0.2.2"
@@ -404,6 +415,15 @@ version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "crypto-common 0.1.7",
+]
+
 [[package]]
 name = "digest"
 version = "0.11.3"
@@ -411,7 +431,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1dd6dbb5841937940781866fa1281a1ff7bd3bf827091440879f9994983d5c2"
 dependencies = [
  "block-buffer",
- "crypto-common",
+ "crypto-common 0.2.2",
 ]
 
 [[package]]
@@ -491,6 +511,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.3.4"
@@ -723,7 +753,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69b6441f590336821bb897fb28fc622898ccceb1d6cea3fde5ea86b090c4de98"
 dependencies = [
  "cfg-if",
- "digest",
+ "digest 0.11.3",
 ]
 
 [[package]]
@@ -1179,7 +1209,7 @@ checksum = "446ba717509524cb3f22f17ecc096f10f4822d76ab5c0b9822c5f9c284e825f4"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "digest",
+ "digest 0.11.3",
 ]
 
 [[package]]
@@ -1200,6 +1230,12 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "199905e6153d6405f9728fe44daace35f8f837bbf830bb6e85fbd5828709a886"
 
+[[package]]
+name = "spin"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "023a211cb3138dbc438680b32560ad89f699977624c9f8dbb95a47d5b4c07dd3"
+
 [[package]]
 name = "static_assertions"
 version = "1.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 519c737e..83324900 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,7 +33,7 @@ version = "0.23.0"
 license = "Apache-2.0"
 repository = "https://github.com/apache/avro-rs"
 edition = "2024"
-rust-version = "1.88.0"
+rust-version = "1.89.0"
 keywords = ["avro", "data", "serialization"]
 categories = ["encoding"]
 documentation = "https://docs.rs/apache-avro"
diff --git a/avro/Cargo.toml b/avro/Cargo.toml
index 6bba447c..aff68486 100644
--- a/avro/Cargo.toml
+++ b/avro/Cargo.toml
@@ -31,7 +31,7 @@ documentation.workspace = true
 [features]
 bzip = ["dep:bzip2"]
 derive = ["dep:apache-avro-derive"]
-snappy = ["dep:crc32fast", "dep:snap"]
+snappy = ["dep:crc-fast", "dep:snap"]
 xz = ["dep:liblzma"]
 zstandard = ["dep:zstd"]
 
@@ -53,7 +53,7 @@ apache-avro-derive = { default-features = false, version = "0.23.0", path = "../
 bigdecimal = { default-features = false, version = "0.4.10", features = ["std", "serde"] }
 bon = { default-features = false, version = "3.9.1" }
 bzip2 = { version = "0.6.1", optional = true }
-crc32fast = { default-features = false, version = "1.5.0", optional = true }
+crc-fast = { default-features = false, features = ["std"], version = "1.10.0", optional = true }
 digest = { default-features = false, version = "0.11.3", features = ["block-api"] }
 miniz_oxide = { default-features = false, version = "0.9.1", features = ["with-alloc"] }
 log = { workspace = true }
diff --git a/avro/src/codec.rs b/avro/src/codec.rs
index 661558e6..0749687c 100644
--- a/avro/src/codec.rs
+++ b/avro/src/codec.rs
@@ -96,9 +96,7 @@ impl Codec {
                     .compress(&stream[..], &mut encoded[..])
                     .map_err(Details::SnappyCompress)?;
 
-                let mut hasher = crc32fast::Hasher::new();
-                hasher.update(&stream[..]);
-                let checksum = hasher.finalize();
+                let checksum = crc_fast::crc32_iso_hdlc(&stream[..]);
                 let checksum_as_bytes = checksum.to_be_bytes();
                 let checksum_len = checksum_as_bytes.len();
                 encoded.truncate(compressed_size + checksum_len);
@@ -191,9 +189,7 @@ impl Codec {
                 last_four.copy_from_slice(&stream[data_end..]);
                 let expected: u32 = u32::from_be_bytes(last_four);
 
-                let mut hasher = crc32fast::Hasher::new();
-                hasher.update(&decoded);
-                let actual = hasher.finalize();
+                let actual = crc_fast::crc32_iso_hdlc(&decoded);
 
                 if expected != actual {
                     return Err(Details::SnappyCrc32{expected, actual}.into());
@@ -354,6 +350,17 @@ mod tests {
         compress_and_decompress(Codec::Snappy)
     }
 
+    #[cfg(feature = "snappy")]
+    #[test]
+    fn snappy_compress_writes_crc32_iso_hdlc_trailer() -> TestResult {
+        let mut stream = b"123456789".to_vec();
+        Codec::Snappy.compress(&mut stream)?;
+
+        assert_eq!(stream[stream.len() - 4..], 0xcbf4_3926_u32.to_be_bytes());
+
+        Ok(())
+    }
+
     #[cfg(feature = "snappy")]
     #[test]
     fn snappy_decompress_short_block_errors_without_panicking() {

From 6bf492672bddd4f98ec690f43a9b49e352a9b45c Mon Sep 17 00:00:00 2001
From: houseme <housemecn@gmail.com>
Date: Sat, 5 Sep 2026 19:27:19 +0800
Subject: [PATCH 2/3] Add Snappy CRC32 benchmark results

Add a Criterion benchmark that compares crc32fast and crc-fast for raw CRC-32/ISO-HDLC, Snappy compression plus CRC, and Snappy decompression plus CRC verification.

Document local aarch64 and remote x86_64 benchmark results, including the relevant SIMD instruction-set differences and the remaining MSRV caveat.

Co-Authored-By: heihutu <heihutu@gmail.com>

Co-Authored-By: zhi22915 <qiuzgang@gmail.com>
---
 Cargo.lock                           |  10 ++
 avro/Cargo.toml                      |   5 +
 avro/benches/crc32_snappy.rs         | 153 +++++++++++++++++++++++++++
 avro/benches/crc32_snappy_results.md | 111 +++++++++++++++++++
 4 files changed, 279 insertions(+)
 create mode 100644 avro/benches/crc32_snappy.rs
 create mode 100644 avro/benches/crc32_snappy_results.md

diff --git a/Cargo.lock b/Cargo.lock
index 20b2b92c..8422f407 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -54,6 +54,7 @@ dependencies = [
  "bon",
  "bzip2",
  "crc-fast",
+ "crc32fast",
  "criterion",
  "digest 0.11.3",
  "hex-literal",
@@ -308,6 +309,15 @@ dependencies = [
  "spin",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8498c871161e1742aaa9d52551b2d6ebdd4c3d45a3be423e3728f33b955be550"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "criterion"
 version = "0.8.2"
diff --git a/avro/Cargo.toml b/avro/Cargo.toml
index aff68486..fb1fed94 100644
--- a/avro/Cargo.toml
+++ b/avro/Cargo.toml
@@ -48,6 +48,10 @@ name = "serde"
 harness = false
 name = "single"
 
+[[bench]]
+harness = false
+name = "crc32_snappy"
+
 [dependencies]
 apache-avro-derive = { default-features = false, version = "0.23.0", path = "../avro_derive", optional = true }
 bigdecimal = { default-features = false, version = "0.4.10", features = ["std", "serde"] }
@@ -81,6 +85,7 @@ rand = { default-features = false, version = "0.10.1", features = ["default"] }
 apache-avro-derive = { default-features = false, version = "0.23.0", path = "../avro_derive" }
 apache-avro-test-helper = { default-features = false, version = "0.23.0", path = "../avro_test_helper" }
 criterion = { default-features = false, version = "0.8.2" }
+crc32fast = { default-features = false, version = "1.5.0" }
 hex-literal = { default-features = false, version = "1.1.0" }
 md-5 = { default-features = false, version = "0.11.0" }
 pretty_assertions = { workspace = true }
diff --git a/avro/benches/crc32_snappy.rs b/avro/benches/crc32_snappy.rs
new file mode 100644
index 00000000..f0d19246
--- /dev/null
+++ b/avro/benches/crc32_snappy.rs
@@ -0,0 +1,153 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+use criterion::{BatchSize, Criterion, Throughput, criterion_group, criterion_main};
+use std::{hint::black_box, time::Duration};
+
+const BLOCK_SIZES: &[usize] = &[128, 1024, 16 * 1024, 1024 * 1024];
+
+fn input(size: usize) -> Vec<u8> {
+    (0..size)
+        .map(|i| {
+            let word = (i as u64)
+                .wrapping_mul(0x9e37_79b9_7f4a_7c15)
+                .rotate_left((i % 63) as u32);
+            (word ^ (word >> 32)) as u8
+        })
+        .collect()
+}
+
+fn crc32fast_checksum(data: &[u8]) -> u32 {
+    let mut hasher = crc32fast::Hasher::new();
+    hasher.update(data);
+    hasher.finalize()
+}
+
+fn crc_fast_checksum(data: &[u8]) -> u32 {
+    crc_fast::crc32_iso_hdlc(data)
+}
+
+fn compress_with_crc32fast(data: &[u8]) -> Vec<u8> {
+    compress_with(data, crc32fast_checksum)
+}
+
+fn compress_with_crc_fast(data: &[u8]) -> Vec<u8> {
+    compress_with(data, crc_fast_checksum)
+}
+
+fn compress_with(data: &[u8], checksum: fn(&[u8]) -> u32) -> Vec<u8> {
+    let mut encoded = vec![0; snap::raw::max_compress_len(data.len())];
+    let compressed_size = snap::raw::Encoder::new()
+        .compress(data, &mut encoded)
+        .expect("snappy compression should succeed");
+
+    encoded.truncate(compressed_size + 4);
+    encoded[compressed_size..].copy_from_slice(&checksum(data).to_be_bytes());
+    encoded
+}
+
+fn decompress_with_crc32fast(compressed: &[u8]) -> Vec<u8> {
+    decompress_with(compressed, crc32fast_checksum)
+}
+
+fn decompress_with_crc_fast(compressed: &[u8]) -> Vec<u8> {
+    decompress_with(compressed, crc_fast_checksum)
+}
+
+fn decompress_with(compressed: &[u8], checksum: fn(&[u8]) -> u32) -> Vec<u8> {
+    let data_end = compressed.len() - 4;
+    let decompressed_size = snap::raw::decompress_len(&compressed[..data_end])
+        .expect("snappy decompressed length should be readable");
+    let mut decoded = vec![0; decompressed_size];
+
+    snap::raw::Decoder::new()
+        .decompress(&compressed[..data_end], &mut decoded)
+        .expect("snappy decompression should succeed");
+
+    let expected = u32::from_be_bytes(compressed[data_end..].try_into().unwrap());
+    assert_eq!(expected, checksum(&decoded));
+    decoded
+}
+
+fn bench_crc32(c: &mut Criterion) {
+    let mut group = c.benchmark_group("crc32_iso_hdlc");
+    for &size in BLOCK_SIZES {
+        let data = input(size);
+        assert_eq!(crc32fast_checksum(&data), crc_fast_checksum(&data));
+        group.throughput(Throughput::Bytes(size as u64));
+
+        group.bench_with_input(format!("crc32fast/{size}"), &data, |b, data| {
+            b.iter(|| crc32fast_checksum(black_box(data)));
+        });
+        group.bench_with_input(format!("crc-fast/{size}"), &data, |b, data| {
+            b.iter(|| crc_fast_checksum(black_box(data)));
+        });
+    }
+    group.finish();
+}
+
+fn bench_snappy_compress(c: &mut Criterion) {
+    let mut group = c.benchmark_group("snappy_compress_with_crc32");
+    for &size in BLOCK_SIZES {
+        let data = input(size);
+        assert_eq!(
+            compress_with_crc32fast(&data)[..],
+            compress_with_crc_fast(&data)[..]
+        );
+        group.throughput(Throughput::Bytes(size as u64));
+
+        group.bench_with_input(format!("crc32fast/{size}"), &data, |b, data| {
+            b.iter(|| compress_with_crc32fast(black_box(data)));
+        });
+        group.bench_with_input(format!("crc-fast/{size}"), &data, |b, data| {
+            b.iter(|| compress_with_crc_fast(black_box(data)));
+        });
+    }
+    group.finish();
+}
+
+fn bench_snappy_decompress(c: &mut Criterion) {
+    let mut group = c.benchmark_group("snappy_decompress_with_crc32");
+    for &size in BLOCK_SIZES {
+        let data = input(size);
+        let compressed = compress_with_crc_fast(&data);
+        group.throughput(Throughput::Bytes(size as u64));
+
+        group.bench_with_input(format!("crc32fast/{size}"), &compressed, |b, compressed| {
+            b.iter_batched(
+                || compressed.clone(),
+                |compressed| decompress_with_crc32fast(black_box(&compressed)),
+                BatchSize::SmallInput,
+            );
+        });
+        group.bench_with_input(format!("crc-fast/{size}"), &compressed, |b, compressed| {
+            b.iter_batched(
+                || compressed.clone(),
+                |compressed| decompress_with_crc_fast(black_box(&compressed)),
+                BatchSize::SmallInput,
+            );
+        });
+    }
+    group.finish();
+}
+
+criterion_group!(
+    name = benches;
+    config = Criterion::default().sample_size(20).measurement_time(Duration::from_secs(5));
+    targets = bench_crc32, bench_snappy_compress, bench_snappy_decompress
+);
+criterion_main!(benches);
diff --git a/avro/benches/crc32_snappy_results.md b/avro/benches/crc32_snappy_results.md
new file mode 100644
index 00000000..862b5da0
--- /dev/null
+++ b/avro/benches/crc32_snappy_results.md
@@ -0,0 +1,111 @@
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+# CRC32 Snappy Benchmark Results
+
+This benchmark compares the current Snappy checksum replacement against the old
+`crc32fast` call pattern. It exercises three paths:
+
+- raw CRC-32/ISO-HDLC over contiguous blocks;
+- Snappy compression plus Avro's trailing CRC32;
+- Snappy decompression plus Avro's trailing CRC32 verification.
+
+Run command:
+
+```bash
+cargo bench -p apache-avro --bench crc32_snappy --features snappy,derive
+```
+
+The benchmark asserts that `crc32fast` and `crc-fast` produce identical CRC32
+values before timing the cases. The Snappy compression benchmark also asserts
+that both variants produce identical compressed blocks, including the big-endian
+CRC trailer.
+
+## Environments
+
+| Label | Host | CPU / arch | Rust |
+| --- | --- | --- | --- |
+| aarch64 | local | Darwin arm64, Mac17,6 | rustc 1.98.1 |
+| x86_64 | azure-4074205200 | AMD EPYC 9V45, x86_64, `pclmulqdq`, `sse4_1`, `sse4_2`, `avx2`, `avx512f`, `avx512vl`, `vpclmulqdq` | rustc 1.98.0 |
+
+## aarch64 Results
+
+Throughput values are Criterion midpoint estimates.
+
+| Path | Block size | crc32fast | crc-fast | Speedup |
+| --- | ---: | ---: | ---: | ---: |
+| CRC only | 128 B | 22.95 GiB/s | 29.00 GiB/s | 1.26x |
+| CRC only | 1 KiB | 12.68 GiB/s | 66.72 GiB/s | 5.26x |
+| CRC only | 16 KiB | 22.34 GiB/s | 78.37 GiB/s | 3.51x |
+| CRC only | 1 MiB | 33.64 GiB/s | 100.17 GiB/s | 2.98x |
+| Snappy compress + CRC | 128 B | 1.64 GiB/s | 1.68 GiB/s | 1.03x |
+| Snappy compress + CRC | 1 KiB | 4.47 GiB/s | 6.18 GiB/s | 1.38x |
+| Snappy compress + CRC | 16 KiB | 7.27 GiB/s | 9.54 GiB/s | 1.31x |
+| Snappy compress + CRC | 1 MiB | 16.55 GiB/s | 26.11 GiB/s | 1.58x |
+| Snappy decompress + CRC | 128 B | 4.68 GiB/s | 4.69 GiB/s | 1.00x |
+| Snappy decompress + CRC | 1 KiB | 8.53 GiB/s | 19.51 GiB/s | 2.29x |
+| Snappy decompress + CRC | 16 KiB | 12.15 GiB/s | 21.99 GiB/s | 1.81x |
+| Snappy decompress + CRC | 1 MiB | 17.42 GiB/s | 25.64 GiB/s | 1.47x |
+
+On aarch64, `crc32fast` uses the ARM CRC extension instructions such as
+`__crc32d` and `__crc32b`, with multi-stream combining for large buffers to
+reduce dependency-chain stalls. `crc-fast` can use PMULL/AES folding for
+CRC-32/ISO-HDLC, and can select a SHA3/EOR3-assisted variant on newer aarch64
+CPUs. That explains why the raw CRC win is strongest once the input is large
+enough to amortize the wider folding setup, and why the win still appears in
+Snappy encode/decode once block sizes grow.
+
+## x86_64 Results
+
+Throughput values are Criterion midpoint estimates.
+
+| Path | Block size | crc32fast | crc-fast | Speedup |
+| --- | ---: | ---: | ---: | ---: |
+| CRC only | 128 B | 6.74 GiB/s | 5.92 GiB/s | 0.88x |
+| CRC only | 1 KiB | 6.18 GiB/s | 26.30 GiB/s | 4.26x |
+| CRC only | 16 KiB | 6.01 GiB/s | 64.49 GiB/s | 10.74x |
+| CRC only | 1 MiB | 5.98 GiB/s | 66.72 GiB/s | 11.15x |
+| Snappy compress + CRC | 128 B | 1.19 GiB/s | 1.38 GiB/s | 1.16x |
+| Snappy compress + CRC | 1 KiB | 3.37 GiB/s | 6.04 GiB/s | 1.79x |
+| Snappy compress + CRC | 16 KiB | 4.50 GiB/s | 15.32 GiB/s | 3.40x |
+| Snappy compress + CRC | 1 MiB | 5.04 GiB/s | 21.76 GiB/s | 4.32x |
+| Snappy decompress + CRC | 128 B | 2.60 GiB/s | 3.20 GiB/s | 1.23x |
+| Snappy decompress + CRC | 1 KiB | 4.07 GiB/s | 10.20 GiB/s | 2.51x |
+| Snappy decompress + CRC | 16 KiB | 4.75 GiB/s | 16.31 GiB/s | 3.44x |
+| Snappy decompress + CRC | 1 MiB | 4.83 GiB/s | 17.94 GiB/s | 3.72x |
+
+On x86/x86_64, the SSE4.2 CRC32 instruction is CRC32C/ISCSI, not
+CRC-32/ISO-HDLC, so it is not the direct instruction for Avro's Snappy
+checksum. The relevant accelerated family for this checksum is carry-less
+multiply: PCLMULQDQ and, where available, wider VPCLMULQDQ/AVX-512 paths.
+On the EPYC 9V45 test host, `crc-fast` scales much better for 1 KiB and larger
+blocks. The 128 B raw CRC case is the one exception, where fixed overhead makes
+`crc32fast` slightly faster, but the Snappy encode/decode paths still favor
+`crc-fast` even at 128 B.
+
+## Conclusion
+
+The replacement is supported by both isolated checksum measurements and
+Snappy-shaped encode/decode measurements. The improvement is not just a raw
+microbenchmark artifact: it remains visible when the checksum is placed next to
+Snappy compression/decompression, especially for 1 KiB and larger Avro blocks.
+
+The main caveat remains MSRV. `crc-fast` 1.10.0 requires Rust 1.89, so this
+replacement should be accepted only together with the workspace and CI MSRV bump
+from 1.88.0 to 1.89.0.

From 5f984045a87094a425f33b5c338bda2df39c9362 Mon Sep 17 00:00:00 2001
From: Kriskras99 <github@kriskras99.nl>
Date: Sat, 5 Sep 2026 18:58:31 +0200
Subject: [PATCH 3/3] chore: Remove benchmark and adjust test name

The benchmark was useful for comparison between `crc32fast` and `crc-fast` but
we're not going to run those benchmarks again.
---
 Cargo.lock                           | 208 +++++++++++++--------------
 avro/Cargo.toml                      |   5 -
 avro/benches/crc32_snappy.rs         | 153 --------------------
 avro/benches/crc32_snappy_results.md | 111 --------------
 avro/src/codec.rs                    |   2 +-
 5 files changed, 100 insertions(+), 379 deletions(-)
 delete mode 100644 avro/benches/crc32_snappy.rs
 delete mode 100644 avro/benches/crc32_snappy_results.md

diff --git a/Cargo.lock b/Cargo.lock
index 8422f407..d2f78ba5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -10,9 +10,9 @@ checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
 
 [[package]]
 name = "aho-corasick"
-version = "1.1.4"
+version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301"
+checksum = "c982642fa9e8606056828ee9a8505737230110bb1099153c79efe865c59d12ba"
 dependencies = [
  "memchr",
 ]
@@ -54,7 +54,6 @@ dependencies = [
  "bon",
  "bzip2",
  "crc-fast",
- "crc32fast",
  "criterion",
  "digest 0.11.3",
  "hex-literal",
@@ -95,7 +94,7 @@ dependencies = [
  "rustversion",
  "serde",
  "serde_json",
- "syn 3.0.4",
+ "syn 3.0.5",
  "trybuild",
  "uuid",
 ]
@@ -111,13 +110,13 @@ dependencies = [
 
 [[package]]
 name = "async-trait"
-version = "0.1.89"
+version = "0.1.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9035ad2d096bed7955a320ee7e2230574d28fd3c3a0f186cbea1ff3c7eed5dbb"
+checksum = "82f6aeea286b8eb4dd3431a1be1b59d290ace00f5bfd8e2a159bc2a05e2c1667"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.119",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -142,9 +141,9 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "2.13.0"
+version = "2.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4388bee8683e3d04af747c73422af53102d2bd24d9eadb6cbc100baef4b43f8"
+checksum = "b588b76d00fde79687d7646a9b5bdf3cc0f655e0bbd080335a95d7e96f3587da"
 
 [[package]]
 name = "block-buffer"
@@ -175,7 +174,7 @@ dependencies = [
  "prettyplease 0.3.0",
  "proc-macro2",
  "quote",
- "syn 3.0.4",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -201,9 +200,9 @@ checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
 
 [[package]]
 name = "cc"
-version = "1.2.66"
+version = "1.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5d6cac793997bd970000024b2934968efe83b382de4fdcf4fcb46b6ee4ad996"
+checksum = "005ec2760ca554fae18df7a11195552ec576cd665632a881bc011d5bb2fd4d80"
 dependencies = [
  "find-msvc-tools",
  "jobserver",
@@ -219,9 +218,9 @@ checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
 [[package]]
 name = "chacha20"
-version = "0.10.1"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d524456ba66e72eb8b115ff89e01e497f8e6d11d78b70b1aa13c0fbd97540a81"
+checksum = "65c35e4b699c7e15ccbe7ee35c005e4fc0a278d22238a2857e6ce2dadeda1b06"
 dependencies = [
  "cfg-if",
  "cpufeatures",
@@ -257,18 +256,18 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.6.1"
+version = "4.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ddb117e43bbf7dacf0a4190fef4d345b9bad68dfc649cb349e7d17d28428e51"
+checksum = "473c7e07f409a8d772161724aa8db6a765a2532a70f9667eeb7b49d3d02fbdca"
 dependencies = [
  "clap_builder",
 ]
 
 [[package]]
 name = "clap_builder"
-version = "4.6.0"
+version = "4.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "714a53001bf66416adb0e2ef5ac857140e7dc3a0c48fb28b2f10762fc4b5069f"
+checksum = "7b48fea5a88e9ae728a2dcbedbfc0e730f7d60da42e1cb049a83c9fb8b789889"
 dependencies = [
  "anstyle",
  "clap_lex",
@@ -292,9 +291,9 @@ dependencies = [
 
 [[package]]
 name = "cpufeatures"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
+checksum = "5ca28b0ae3115b884660db4118d803791fd6756b6e88f39c0f3f7859060d7566"
 dependencies = [
  "libc",
 ]
@@ -309,15 +308,6 @@ dependencies = [
  "spin",
 ]
 
-[[package]]
-name = "crc32fast"
-version = "1.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8498c871161e1742aaa9d52551b2d6ebdd4c3d45a3be423e3728f33b955be550"
-dependencies = [
- "cfg-if",
-]
-
 [[package]]
 name = "criterion"
 version = "0.8.2"
@@ -405,7 +395,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn 3.0.4",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -416,7 +406,7 @@ checksum = "2ac7135c3ef02b2f7833bbeb1be5ba7f966dcde8a87c6b87f65a778d71a02785"
 dependencies = [
  "darling_core",
  "quote",
- "syn 3.0.4",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -455,9 +445,9 @@ dependencies = [
 
 [[package]]
 name = "either"
-version = "1.16.0"
+version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91622ff5e7162018101f2fea40d6ebf4a78bbe5a49736a2020649edf9693679e"
+checksum = "252afb9ae5eaa683babdc6a068b3f5726eb19e05070c731f9b2a23a7c3e8ed34"
 
 [[package]]
 name = "env_filter"
@@ -487,33 +477,33 @@ checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
 [[package]]
 name = "fastrand"
-version = "2.4.1"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f1f227452a390804cdb637b74a86990f2a7d7ba4b7d5693aac9b4dd6defd8d6"
+checksum = "da7c62ceae207dd37ea5b845da6a0696c799f85e97da1ab5b7910be3c1c80223"
 
 [[package]]
 name = "find-msvc-tools"
-version = "0.1.9"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
+checksum = "3e0f1c7c3a72c66fd80abe965175f7523475c0489a87d3ff9d6e8c87d87a9d2d"
 
 [[package]]
 name = "futures-core"
-version = "0.3.32"
+version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e3450815272ef58cec6d564423f6e755e25379b217b0bc688e295ba24df6b1d"
+checksum = "92d699e522242e69e3003b94ecc1f960f3a5e015aa7c5d7486e65ad01dd94f5e"
 
 [[package]]
 name = "futures-task"
-version = "0.3.32"
+version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "037711b3d59c33004d3856fbdc83b99d4ff37a24768fa1be9ce3538a1cde4393"
+checksum = "cd417de3d1d015fc3bfd2b1ea46dfc7bab72ef86f1cc7cc9c78e728b34a6d1fd"
 
 [[package]]
 name = "futures-util"
-version = "0.3.32"
+version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "389ca41296e6190b48053de0321d02a77f32f8a5d2461dd38762c0593805c6d6"
+checksum = "0d50a92467f8ba5dd6e3ee5d4bd04d73ab2e4e1c44474a0674821dfce14b79bc"
 dependencies = [
  "futures-core",
  "futures-task",
@@ -557,9 +547,9 @@ dependencies = [
 
 [[package]]
 name = "glob"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0cc23270f6e1808e30a928bdc84dea0b9b4136a8bc82338574f23baf47bbd280"
+checksum = "e4eba85ea1d0a966a983acd07deee566e67395d2d96b6fb39e62b5a833f1eb0b"
 
 [[package]]
 name = "half"
@@ -609,9 +599,9 @@ checksum = "e712f64ec3850b98572bffac52e2c6f282b29fe6c5fa6d42334b30be438d95c1"
 
 [[package]]
 name = "hybrid-array"
-version = "0.4.13"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "818356c5132c1fede50f837ca96afbe78ff42413047f4abb886217845e1b6c8c"
+checksum = "707114b52a152fa7bdb290cd7cd5912d9467273b6d74e21b8d81aca1f8533f6b"
 dependencies = [
  "typenum",
 ]
@@ -624,9 +614,9 @@ checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
 [[package]]
 name = "indexmap"
-version = "2.14.0"
+version = "2.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d466e9454f08e4a911e14806c24e16fba1b4c121d1ea474396f396069cf949d9"
+checksum = "cc4e190f5d26ca7051642629da2c52fc03bde85a03197c99408dcd291734c855"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -659,9 +649,9 @@ dependencies = [
 
 [[package]]
 name = "js-sys"
-version = "0.3.104"
+version = "0.3.105"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e0c1080212aad755ea003d18543e8768dd432c48819efd73a7bf1e39b7a5a3a"
+checksum = "ce57d20d1ea864ce2ac172ab472d409214f4fd359f0b2a2775abdf522e2af99e"
 dependencies = [
  "cfg-if",
  "futures-util",
@@ -676,9 +666,9 @@ checksum = "34b357333733e8260735ba5894eb928c02ecc69c78715f01a8019e7fa7f2db4c"
 
 [[package]]
 name = "libc"
-version = "0.2.186"
+version = "0.2.189"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
+checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
 
 [[package]]
 name = "liblzma"
@@ -768,9 +758,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.8.2"
+version = "2.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88904434abc2901f197fe8cc55f0445e7ded921dba5911dad2e2b39b48e663c4"
+checksum = "cf8baf1c55e62ffcace7a9f06f4bd9cd3f0c4beb022d3b367256b91b87513d98"
 
 [[package]]
 name = "minicov"
@@ -813,9 +803,9 @@ dependencies = [
 
 [[package]]
 name = "num-integer"
-version = "0.1.46"
+version = "0.1.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+checksum = "7ce2d95d4b3734dc35aa2f45e1aa22cd416814592a4f9d9205e11affd5b8e10b"
 dependencies = [
  "num-traits",
 ]
@@ -890,9 +880,9 @@ checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
 
 [[package]]
 name = "pkg-config"
-version = "0.3.33"
+version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19f132c84eca552bf34cab8ec81f1c1dcc229b811638f9d283dceabe58c5569e"
+checksum = "f6b464fbc74e149a392436b17d523f769e057cb6877f6a5c4618bc6f11800548"
 
 [[package]]
 name = "ppv-lite86"
@@ -930,7 +920,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2bfe0f4c752e450fc2faf62654f1c134747922825d5b04ca717b8874f41a40c0"
 dependencies = [
  "proc-macro2",
- "syn 3.0.4",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -963,7 +953,7 @@ checksum = "4b45fcc2344c680f5025fe57779faef368840d0bd1f42f216291f0dc4ace4744"
 dependencies = [
  "bitflags",
  "num-traits",
- "rand 0.9.4",
+ "rand 0.9.5",
  "rand_chacha",
  "rand_xorshift",
  "regex-syntax",
@@ -999,9 +989,9 @@ checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
 [[package]]
 name = "rand"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
+checksum = "b9ef1d0d795eb7d84685bca4f72f3649f064e6641543d3a8c415898726a57b41"
 dependencies = [
  "rand_chacha",
  "rand_core 0.9.5",
@@ -1054,9 +1044,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.12.4"
+version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1292b7759ae1cb9ec195452d1390a074f0cd8541ab7a5a8c31cd6db45d4a6ba"
+checksum = "f020237b6c8eed93db2e2cb53c00c60a8e1bc73da7d073199a1180401450218d"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1066,9 +1056,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.14"
+version = "0.4.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
+checksum = "ad8553b9b26413251cbf30e620595c7a41b3887f03da04579c0e6b0d6a06b4b2"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1186,7 +1176,7 @@ checksum = "e7a5d71263a5a7d47b41f6b3f06ba276f10cc18b0931f1799f710578e2309348"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.4",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -1292,9 +1282,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "3.0.4"
+version = "3.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6275cddf4610d1775e6d1fe9469b2e77d0f39fd98fb7450901b821e0c53649f"
+checksum = "12df2e0110f65b775f769bb17ef989067a1d931b2eb822bd4346631eeada89f9"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1303,9 +1293,9 @@ dependencies = [
 
 [[package]]
 name = "target-triple"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "591ef38edfb78ca4771ee32cf494cb8771944bee237a9b91fc9c1424ac4b777b"
+checksum = "c3a6bfce3d99adfa72d24750a61f782f3036a81e7f86d8841ee1326deaebd171"
 
 [[package]]
 name = "termcolor"
@@ -1333,7 +1323,7 @@ checksum = "bc04cd3e1236dd4a98afca4569f2deb3f120e5422a4023be2cb683f8486292af"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 3.0.4",
+ "syn 3.0.5",
 ]
 
 [[package]]
@@ -1348,9 +1338,9 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "1.1.2+spec-1.1.0"
+version = "1.1.5+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81f3d15e84cbcd896376e6730314d59fb5a87f31e4b038454184435cd57defee"
+checksum = "12c0ba9680044b4ce98d391a62094047eada0d64860b80166c39f4a6b5640785"
 dependencies = [
  "indexmap",
  "serde_core",
@@ -1372,18 +1362,18 @@ dependencies = [
 
 [[package]]
 name = "toml_parser"
-version = "1.1.2+spec-1.1.0"
+version = "1.1.3+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2abe9b86193656635d2411dc43050282ca48aa31c2451210f4202550afb7526"
+checksum = "1d38ac1cf9b95face32296c0a3ede1fdc270627c9d9c02a7274dd6d960dc4d56"
 dependencies = [
  "winnow",
 ]
 
 [[package]]
 name = "toml_writer"
-version = "1.1.1+spec-1.1.0"
+version = "1.1.2+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "756daf9b1013ebe47a8776667b466417e2d4c5679d441c26230efd9ef78692db"
+checksum = "7d56353a2a665ad0f41a421187180aab746c8c325620617ad883a99a1cbe66d2"
 
 [[package]]
 name = "trybuild"
@@ -1456,9 +1446,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.127"
+version = "0.2.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b70935747edd64d89de3efa29d73789b806c15798f8e7dca4d8ac356b50ce70"
+checksum = "aecb87a33d3b0c5e3b7aa46336eaf486cffafbd281b195e4c8b80d50df2351bf"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -1469,9 +1459,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.77"
+version = "0.4.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b7777d5cc23d0e91404e53ce2d5e8ec7acae3026b16233dba62cd3246457950"
+checksum = "6ef4c5d3d2cdf5c54f4231181768f5510842e350db025faf1f7163b1030ed928"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -1479,9 +1469,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.127"
+version = "0.2.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77775f8f3f7217702089053b94958f8f54061a3f663417df76e19cbdcca29bc1"
+checksum = "a690d511e3c1a8b3a55e33511e3c2c00c78415cd23650f32b808627f5696b9ed"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -1489,31 +1479,31 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.127"
+version = "0.2.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e11d33f857dc2fb11b8bc75aee111aa9cbeb12cd9f25efd3d4c2a3dd4e235284"
+checksum = "411e4887f0071ef2d2164a9d5fdf2d20efbef78fccd3a78b0c10a1dc5295e48a"
 dependencies = [
  "bumpalo",
  "proc-macro2",
  "quote",
- "syn 2.0.119",
+ "syn 3.0.5",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.127"
+version = "0.2.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ef64dbcc55df09c7e5a46182d181c2cfa3e925f3da937ea764728b4bbb9dcbf"
+checksum = "81941cd78d0c92026c33e5e01312845a4cb1e9af3407f9134b100dd03144103e"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "wasm-bindgen-test"
-version = "0.3.77"
+version = "0.3.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "895a2607575412a4eda1df892084a375ea10dfeadc4d7d2ab87b854e4ddc7ba1"
+checksum = "45863ef0bef521c12124eb39d9a38513c47db75f22e503c06beacd40afeb35db"
 dependencies = [
  "async-trait",
  "cast",
@@ -1533,20 +1523,20 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-test-macro"
-version = "0.3.77"
+version = "0.3.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4288cb0ebe215033bf949ae1fd046726daa4c32a157f24b9dc6ac387a52aa759"
+checksum = "8c89dcab8b516b6b603baca9d550b7282d68fcc7f367e3956cff7ebf406a3f12"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.119",
+ "syn 3.0.5",
 ]
 
 [[package]]
 name = "wasm-bindgen-test-shared"
-version = "0.2.127"
+version = "0.2.128"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33ff1c1b360982e93b6d8ea9c04836f71dba0817a16f91e229cf3a51bdd9d987"
+checksum = "f37b4f992cebe528ef34964ae69681ac0fe7080071e7298e46008f9d380302af"
 
 [[package]]
 name = "winapi"
@@ -1596,9 +1586,9 @@ dependencies = [
 
 [[package]]
 name = "winnow"
-version = "1.0.3"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0592e1c9d151f854e6fd382574c3a0855250e1d9b2f99d9281c6e6391af352f1"
+checksum = "23b97319f7b8343df12cc98938e5c3eb436064524c8d2b4e30a1d3a36eecdf81"
 
 [[package]]
 name = "wit-bindgen"
@@ -1614,18 +1604,18 @@ checksum = "cfe53a6657fd280eaa890a3bc59152892ffa3e30101319d168b781ed6529b049"
 
 [[package]]
 name = "zerocopy"
-version = "0.8.52"
+version = "0.8.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce1022995ff5ff5d841ad7d994facc23098cd40152f2c1d11cd607c6f530653f"
+checksum = "556764e583adb45a9f8d413c2a147fa7e8d821e48e12b14fd560b607998b75eb"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.52"
+version = "0.8.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ae7f38b72ec2a254e2b87ef277cf2cd4fb97cbebf944faa6f33354da0867930"
+checksum = "f2ab42fc20575779bd240faa45f94a74256f755c0fa9e89f0ede20d91d0cdfc1"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1634,9 +1624,9 @@ dependencies = [
 
 [[package]]
 name = "zmij"
-version = "1.0.21"
+version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
+checksum = "29666d0abbfad1e3dc4dcf6144730dd3a3ab225bbbdac83319345b1b44ccfc1b"
 
 [[package]]
 name = "zstd"
@@ -1649,18 +1639,18 @@ dependencies = [
 
 [[package]]
 name = "zstd-safe"
-version = "7.2.4"
+version = "7.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f49c4d5f0abb602a93fb8736af2a4f4dd9512e36f7f570d66e65ff867ed3b9d"
+checksum = "64d80649ab6db9d9f6f9c80a40becd948eda4714a0a5ac8c4d157a32231c7882"
 dependencies = [
  "zstd-sys",
 ]
 
 [[package]]
 name = "zstd-sys"
-version = "2.0.16+zstd.1.5.7"
+version = "2.1.0+zstd.1.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91e19ebc2adc8f83e43039e79776e3fda8ca919132d68a1fed6a5faca2683748"
+checksum = "0ef0a8027ec3ee71300ab3bcbcd0393f434aa72b91ca6d635a39941deae8eea0"
 dependencies = [
  "cc",
  "pkg-config",
diff --git a/avro/Cargo.toml b/avro/Cargo.toml
index fb1fed94..aff68486 100644
--- a/avro/Cargo.toml
+++ b/avro/Cargo.toml
@@ -48,10 +48,6 @@ name = "serde"
 harness = false
 name = "single"
 
-[[bench]]
-harness = false
-name = "crc32_snappy"
-
 [dependencies]
 apache-avro-derive = { default-features = false, version = "0.23.0", path = "../avro_derive", optional = true }
 bigdecimal = { default-features = false, version = "0.4.10", features = ["std", "serde"] }
@@ -85,7 +81,6 @@ rand = { default-features = false, version = "0.10.1", features = ["default"] }
 apache-avro-derive = { default-features = false, version = "0.23.0", path = "../avro_derive" }
 apache-avro-test-helper = { default-features = false, version = "0.23.0", path = "../avro_test_helper" }
 criterion = { default-features = false, version = "0.8.2" }
-crc32fast = { default-features = false, version = "1.5.0" }
 hex-literal = { default-features = false, version = "1.1.0" }
 md-5 = { default-features = false, version = "0.11.0" }
 pretty_assertions = { workspace = true }
diff --git a/avro/benches/crc32_snappy.rs b/avro/benches/crc32_snappy.rs
deleted file mode 100644
index f0d19246..00000000
--- a/avro/benches/crc32_snappy.rs
+++ /dev/null
@@ -1,153 +0,0 @@
-// Licensed to the Apache Software Foundation (ASF) under one
-// or more contributor license agreements.  See the NOTICE file
-// distributed with this work for additional information
-// regarding copyright ownership.  The ASF licenses this file
-// to you under the Apache License, Version 2.0 (the
-// "License"); you may not use this file except in compliance
-// with the License.  You may obtain a copy of the License at
-//
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing,
-// software distributed under the License is distributed on an
-// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-// KIND, either express or implied.  See the License for the
-// specific language governing permissions and limitations
-// under the License.
-
-use criterion::{BatchSize, Criterion, Throughput, criterion_group, criterion_main};
-use std::{hint::black_box, time::Duration};
-
-const BLOCK_SIZES: &[usize] = &[128, 1024, 16 * 1024, 1024 * 1024];
-
-fn input(size: usize) -> Vec<u8> {
-    (0..size)
-        .map(|i| {
-            let word = (i as u64)
-                .wrapping_mul(0x9e37_79b9_7f4a_7c15)
-                .rotate_left((i % 63) as u32);
-            (word ^ (word >> 32)) as u8
-        })
-        .collect()
-}
-
-fn crc32fast_checksum(data: &[u8]) -> u32 {
-    let mut hasher = crc32fast::Hasher::new();
-    hasher.update(data);
-    hasher.finalize()
-}
-
-fn crc_fast_checksum(data: &[u8]) -> u32 {
-    crc_fast::crc32_iso_hdlc(data)
-}
-
-fn compress_with_crc32fast(data: &[u8]) -> Vec<u8> {
-    compress_with(data, crc32fast_checksum)
-}
-
-fn compress_with_crc_fast(data: &[u8]) -> Vec<u8> {
-    compress_with(data, crc_fast_checksum)
-}
-
-fn compress_with(data: &[u8], checksum: fn(&[u8]) -> u32) -> Vec<u8> {
-    let mut encoded = vec![0; snap::raw::max_compress_len(data.len())];
-    let compressed_size = snap::raw::Encoder::new()
-        .compress(data, &mut encoded)
-        .expect("snappy compression should succeed");
-
-    encoded.truncate(compressed_size + 4);
-    encoded[compressed_size..].copy_from_slice(&checksum(data).to_be_bytes());
-    encoded
-}
-
-fn decompress_with_crc32fast(compressed: &[u8]) -> Vec<u8> {
-    decompress_with(compressed, crc32fast_checksum)
-}
-
-fn decompress_with_crc_fast(compressed: &[u8]) -> Vec<u8> {
-    decompress_with(compressed, crc_fast_checksum)
-}
-
-fn decompress_with(compressed: &[u8], checksum: fn(&[u8]) -> u32) -> Vec<u8> {
-    let data_end = compressed.len() - 4;
-    let decompressed_size = snap::raw::decompress_len(&compressed[..data_end])
-        .expect("snappy decompressed length should be readable");
-    let mut decoded = vec![0; decompressed_size];
-
-    snap::raw::Decoder::new()
-        .decompress(&compressed[..data_end], &mut decoded)
-        .expect("snappy decompression should succeed");
-
-    let expected = u32::from_be_bytes(compressed[data_end..].try_into().unwrap());
-    assert_eq!(expected, checksum(&decoded));
-    decoded
-}
-
-fn bench_crc32(c: &mut Criterion) {
-    let mut group = c.benchmark_group("crc32_iso_hdlc");
-    for &size in BLOCK_SIZES {
-        let data = input(size);
-        assert_eq!(crc32fast_checksum(&data), crc_fast_checksum(&data));
-        group.throughput(Throughput::Bytes(size as u64));
-
-        group.bench_with_input(format!("crc32fast/{size}"), &data, |b, data| {
-            b.iter(|| crc32fast_checksum(black_box(data)));
-        });
-        group.bench_with_input(format!("crc-fast/{size}"), &data, |b, data| {
-            b.iter(|| crc_fast_checksum(black_box(data)));
-        });
-    }
-    group.finish();
-}
-
-fn bench_snappy_compress(c: &mut Criterion) {
-    let mut group = c.benchmark_group("snappy_compress_with_crc32");
-    for &size in BLOCK_SIZES {
-        let data = input(size);
-        assert_eq!(
-            compress_with_crc32fast(&data)[..],
-            compress_with_crc_fast(&data)[..]
-        );
-        group.throughput(Throughput::Bytes(size as u64));
-
-        group.bench_with_input(format!("crc32fast/{size}"), &data, |b, data| {
-            b.iter(|| compress_with_crc32fast(black_box(data)));
-        });
-        group.bench_with_input(format!("crc-fast/{size}"), &data, |b, data| {
-            b.iter(|| compress_with_crc_fast(black_box(data)));
-        });
-    }
-    group.finish();
-}
-
-fn bench_snappy_decompress(c: &mut Criterion) {
-    let mut group = c.benchmark_group("snappy_decompress_with_crc32");
-    for &size in BLOCK_SIZES {
-        let data = input(size);
-        let compressed = compress_with_crc_fast(&data);
-        group.throughput(Throughput::Bytes(size as u64));
-
-        group.bench_with_input(format!("crc32fast/{size}"), &compressed, |b, compressed| {
-            b.iter_batched(
-                || compressed.clone(),
-                |compressed| decompress_with_crc32fast(black_box(&compressed)),
-                BatchSize::SmallInput,
-            );
-        });
-        group.bench_with_input(format!("crc-fast/{size}"), &compressed, |b, compressed| {
-            b.iter_batched(
-                || compressed.clone(),
-                |compressed| decompress_with_crc_fast(black_box(&compressed)),
-                BatchSize::SmallInput,
-            );
-        });
-    }
-    group.finish();
-}
-
-criterion_group!(
-    name = benches;
-    config = Criterion::default().sample_size(20).measurement_time(Duration::from_secs(5));
-    targets = bench_crc32, bench_snappy_compress, bench_snappy_decompress
-);
-criterion_main!(benches);
diff --git a/avro/benches/crc32_snappy_results.md b/avro/benches/crc32_snappy_results.md
deleted file mode 100644
index 862b5da0..00000000
--- a/avro/benches/crc32_snappy_results.md
+++ /dev/null
@@ -1,111 +0,0 @@
-<!--
-Licensed to the Apache Software Foundation (ASF) under one
-or more contributor license agreements.  See the NOTICE file
-distributed with this work for additional information
-regarding copyright ownership.  The ASF licenses this file
-to you under the Apache License, Version 2.0 (the
-"License"); you may not use this file except in compliance
-with the License.  You may obtain a copy of the License at
-
-  http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing,
-software distributed under the License is distributed on an
-"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, either express or implied.  See the License for the
-specific language governing permissions and limitations
-under the License.
--->
-
-# CRC32 Snappy Benchmark Results
-
-This benchmark compares the current Snappy checksum replacement against the old
-`crc32fast` call pattern. It exercises three paths:
-
-- raw CRC-32/ISO-HDLC over contiguous blocks;
-- Snappy compression plus Avro's trailing CRC32;
-- Snappy decompression plus Avro's trailing CRC32 verification.
-
-Run command:
-
-```bash
-cargo bench -p apache-avro --bench crc32_snappy --features snappy,derive
-```
-
-The benchmark asserts that `crc32fast` and `crc-fast` produce identical CRC32
-values before timing the cases. The Snappy compression benchmark also asserts
-that both variants produce identical compressed blocks, including the big-endian
-CRC trailer.
-
-## Environments
-
-| Label | Host | CPU / arch | Rust |
-| --- | --- | --- | --- |
-| aarch64 | local | Darwin arm64, Mac17,6 | rustc 1.98.1 |
-| x86_64 | azure-4074205200 | AMD EPYC 9V45, x86_64, `pclmulqdq`, `sse4_1`, `sse4_2`, `avx2`, `avx512f`, `avx512vl`, `vpclmulqdq` | rustc 1.98.0 |
-
-## aarch64 Results
-
-Throughput values are Criterion midpoint estimates.
-
-| Path | Block size | crc32fast | crc-fast | Speedup |
-| --- | ---: | ---: | ---: | ---: |
-| CRC only | 128 B | 22.95 GiB/s | 29.00 GiB/s | 1.26x |
-| CRC only | 1 KiB | 12.68 GiB/s | 66.72 GiB/s | 5.26x |
-| CRC only | 16 KiB | 22.34 GiB/s | 78.37 GiB/s | 3.51x |
-| CRC only | 1 MiB | 33.64 GiB/s | 100.17 GiB/s | 2.98x |
-| Snappy compress + CRC | 128 B | 1.64 GiB/s | 1.68 GiB/s | 1.03x |
-| Snappy compress + CRC | 1 KiB | 4.47 GiB/s | 6.18 GiB/s | 1.38x |
-| Snappy compress + CRC | 16 KiB | 7.27 GiB/s | 9.54 GiB/s | 1.31x |
-| Snappy compress + CRC | 1 MiB | 16.55 GiB/s | 26.11 GiB/s | 1.58x |
-| Snappy decompress + CRC | 128 B | 4.68 GiB/s | 4.69 GiB/s | 1.00x |
-| Snappy decompress + CRC | 1 KiB | 8.53 GiB/s | 19.51 GiB/s | 2.29x |
-| Snappy decompress + CRC | 16 KiB | 12.15 GiB/s | 21.99 GiB/s | 1.81x |
-| Snappy decompress + CRC | 1 MiB | 17.42 GiB/s | 25.64 GiB/s | 1.47x |
-
-On aarch64, `crc32fast` uses the ARM CRC extension instructions such as
-`__crc32d` and `__crc32b`, with multi-stream combining for large buffers to
-reduce dependency-chain stalls. `crc-fast` can use PMULL/AES folding for
-CRC-32/ISO-HDLC, and can select a SHA3/EOR3-assisted variant on newer aarch64
-CPUs. That explains why the raw CRC win is strongest once the input is large
-enough to amortize the wider folding setup, and why the win still appears in
-Snappy encode/decode once block sizes grow.
-
-## x86_64 Results
-
-Throughput values are Criterion midpoint estimates.
-
-| Path | Block size | crc32fast | crc-fast | Speedup |
-| --- | ---: | ---: | ---: | ---: |
-| CRC only | 128 B | 6.74 GiB/s | 5.92 GiB/s | 0.88x |
-| CRC only | 1 KiB | 6.18 GiB/s | 26.30 GiB/s | 4.26x |
-| CRC only | 16 KiB | 6.01 GiB/s | 64.49 GiB/s | 10.74x |
-| CRC only | 1 MiB | 5.98 GiB/s | 66.72 GiB/s | 11.15x |
-| Snappy compress + CRC | 128 B | 1.19 GiB/s | 1.38 GiB/s | 1.16x |
-| Snappy compress + CRC | 1 KiB | 3.37 GiB/s | 6.04 GiB/s | 1.79x |
-| Snappy compress + CRC | 16 KiB | 4.50 GiB/s | 15.32 GiB/s | 3.40x |
-| Snappy compress + CRC | 1 MiB | 5.04 GiB/s | 21.76 GiB/s | 4.32x |
-| Snappy decompress + CRC | 128 B | 2.60 GiB/s | 3.20 GiB/s | 1.23x |
-| Snappy decompress + CRC | 1 KiB | 4.07 GiB/s | 10.20 GiB/s | 2.51x |
-| Snappy decompress + CRC | 16 KiB | 4.75 GiB/s | 16.31 GiB/s | 3.44x |
-| Snappy decompress + CRC | 1 MiB | 4.83 GiB/s | 17.94 GiB/s | 3.72x |
-
-On x86/x86_64, the SSE4.2 CRC32 instruction is CRC32C/ISCSI, not
-CRC-32/ISO-HDLC, so it is not the direct instruction for Avro's Snappy
-checksum. The relevant accelerated family for this checksum is carry-less
-multiply: PCLMULQDQ and, where available, wider VPCLMULQDQ/AVX-512 paths.
-On the EPYC 9V45 test host, `crc-fast` scales much better for 1 KiB and larger
-blocks. The 128 B raw CRC case is the one exception, where fixed overhead makes
-`crc32fast` slightly faster, but the Snappy encode/decode paths still favor
-`crc-fast` even at 128 B.
-
-## Conclusion
-
-The replacement is supported by both isolated checksum measurements and
-Snappy-shaped encode/decode measurements. The improvement is not just a raw
-microbenchmark artifact: it remains visible when the checksum is placed next to
-Snappy compression/decompression, especially for 1 KiB and larger Avro blocks.
-
-The main caveat remains MSRV. `crc-fast` 1.10.0 requires Rust 1.89, so this
-replacement should be accepted only together with the workspace and CI MSRV bump
-from 1.88.0 to 1.89.0.
diff --git a/avro/src/codec.rs b/avro/src/codec.rs
index 0749687c..77d275ee 100644
--- a/avro/src/codec.rs
+++ b/avro/src/codec.rs
@@ -352,7 +352,7 @@ mod tests {
 
     #[cfg(feature = "snappy")]
     #[test]
-    fn snappy_compress_writes_crc32_iso_hdlc_trailer() -> TestResult {
+    fn avro_rs_660_snappy_compress_writes_crc32_iso_hdlc_trailer() -> TestResult {
         let mut stream = b"123456789".to_vec();
         Codec::Snappy.compress(&mut stream)?;