From af5ea9445c5eae2650867d0f1f650f0de6b142ab Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Wed, 23 Aug 2023 09:29:45 +1000
Subject: [PATCH] Use `into_iter` instead of `iter`.
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It's slightly faster. On a huge file, old:
```
Benchmark 1: target/release/counts big2 > /dev/null
  Time (mean ± σ):     942.4 ms ±  21.1 ms    [User: 884.6 ms, System: 57.7 ms]
  Range (min … max):   917.7 ms … 971.3 ms    10 runs
```
and new:
```
Benchmark 1: target/release/counts big2 > /dev/null
  Time (mean ± σ):     932.6 ms ±  14.2 ms    [User: 874.2 ms, System: 58.4 ms]
  Range (min … max):   902.8 ms … 952.0 ms    10 runs
```
---
 src/main.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 7304db3..a54bcde 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -158,7 +158,7 @@ where
 
     // Sort from highest count to lowest count. For lines with the same count,
     // sort them in alphabetical order.
-    let mut counts: Vec<_> = counts.iter().collect();
+    let mut counts: Vec<_> = counts.into_iter().collect();
     counts.sort_unstable_by(|(line1, n1), (line2, n2)| {
         (n2.abs(), line1).partial_cmp(&(n1.abs(), line2)).unwrap()
     });
@@ -166,7 +166,7 @@ where
     writeln!(io::stdout(), "{:.1} counts{}", total, label)?;
     let mut cum_perc: f64 = 0f64;
     let total_f64 = total.into_f64();
-    for (i, (line, &weight)) in counts.iter().enumerate() {
+    for (i, (line, weight)) in counts.iter().enumerate() {
         let perc: f64 = weight.into_f64() * 100f64 / total_f64;
         cum_perc += perc;
         writeln!(