From a87c43e60dd6cc73a4d18917fd0fb76d937c4984 Mon Sep 17 00:00:00 2001
From: "Joshua J. Drake" <github.jdrake@qoop.org>
Date: Mon, 19 Jan 2026 00:35:51 -0600
Subject: [PATCH] Avoid duplicate utf8 parsing

I spent 2 hours yelling at my screen about this one when I watched your
10 hour YouTube video today. Hope this change helps get the runtime
under 1 second.
---
 src/main.rs | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index fd20d9d..ffefb80 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -233,12 +233,6 @@ fn print(stats: BTreeMap<String, Stat>) {
     let stdout = stdout.lock();
     let mut writer = std::io::BufWriter::new(stdout);
     write!(writer, "{{").unwrap();
-    let stats = BTreeMap::from_iter(
-        stats
-            .iter()
-            // SAFETY: the README promised
-            .map(|(k, v)| (unsafe { std::str::from_utf8_unchecked(k.as_ref()) }, *v)),
-    );
     let mut stats = stats.into_iter().peekable();
     while let Some((station, stat)) = stats.next() {
         write!(