From df1a918bc862ca8a4cf54b0cb89b59b15e329d34 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Sun, 14 Jun 2026 21:27:39 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20Optimize=20string=20allocat?=
 =?UTF-8?q?ions=20in=20casing=20utility?=
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* Replace `.collect::<Vec<_>>().join("")` with `.collect::<String>()`
  to avoid an unnecessary intermediate vector allocation.
* Replace `.collect::<String>()` with `.to_string()` when lowercasing
  single characters to directly utilize the Display implementation.

Co-authored-by: cloudesize67-cmd <237356855+cloudesize67-cmd@users.noreply.github.com>
---
 .jules/bolt.md        |  3 +++
 xdk-lib/src/casing.rs | 10 ++++------
 2 files changed, 7 insertions(+), 6 deletions(-)
 create mode 100644 .jules/bolt.md

diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 00000000..34d24f53
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2024-05-18 - Optimize string allocations in Casing conversions
+**Learning:** In Rust, avoid `.collect::<Vec<_>>().join("")` when you just want to concatenate strings. Collecting into a `Vec` allocates unnecessary intermediate memory.
+**Action:** Use `.collect::<String>()` directly on an iterator that yields string-like objects to prevent unnecessary `Vec` allocations.
diff --git a/xdk-lib/src/casing.rs b/xdk-lib/src/casing.rs
index 6463487e..9bf78a4b 100644
--- a/xdk-lib/src/casing.rs
+++ b/xdk-lib/src/casing.rs
@@ -29,11 +29,8 @@ impl Casing {
                     result
                 }
             }
-            Casing::Pascal => words
-                .iter()
-                .map(|w| pascal_case(w))
-                .collect::<Vec<_>>()
-                .join(""),
+            // Performance optimization: Using `.collect::<String>()` instead of `.collect::<Vec<_>>().join("")` avoids an intermediate Vec allocation
+            Casing::Pascal => words.iter().map(|w| pascal_case(w)).collect::<String>(),
             Casing::Kebab => words.join("-").to_lowercase(),
             Casing::ScreamingSnake => words.join("_").to_uppercase(),
         }
@@ -118,6 +115,7 @@ pub fn camel_case(value: &str) -> String {
     let mut chars = pascal.chars();
     match chars.next() {
         None => String::new(),
-        Some(first) => first.to_lowercase().collect::<String>() + chars.as_str(),
+        // Performance optimization: Avoids iterator collection overhead.
+        Some(first) => first.to_lowercase().to_string() + chars.as_str(),
     }
 }