trim-bench-additions.rs

    // Note: probably not a good idea to check in directly,
    // since it will cause this benchmark to fluctuate when
    // ext_slice.rs changes size...
    const SOURCE: &str = include_str!("../../src/ext_slice.rs");
    fn source_lines() -> Vec<String> {
        SOURCE.lines().map(|s| format!("{}\r\n", s)).collect::<Vec<_>>()
    }
    define(c, "bstr/trim", "source-lines", SOURCE.as_bytes(), move |b| {
        let lines = source_lines();
        b.iter(|| {
            for line in &lines {
                criterion::black_box(line.as_bytes().trim());
            }
        });
    });
    define(c, "std/trim", "source-lines", SOURCE.as_bytes(), move |b| {
        let lines = source_lines();
        b.iter(|| {
            for line in &lines {
                criterion::black_box(line.trim());
            }
        });
    });
    let large_ascii_padded = || format!("{0}x{0}", " \t\r\n".repeat(512));
    define(
        c,
        "bstr/trim",
        "large-ascii-padded",
        large_ascii_padded().as_bytes(),
        move |b| {
            let corpus = large_ascii_padded();
            b.iter(|| {
                assert_eq!("x".as_bytes(), corpus.as_bytes().trim());
            });
        },
    );
    define(
        c,
        "std/trim",
        "large-ascii-padded",
        large_ascii_padded().as_bytes(),
        move |b| {
            let corpus = large_ascii_padded();
            b.iter(|| {
                assert_eq!("x", corpus.trim());
            });
        },
    );

trim-bench.diff

diff --git a/bench/src/bench.rs b/bench/src/bench.rs
index 3fa5ae0..269e33c 100644
--- a/bench/src/bench.rs
+++ b/bench/src/bench.rs
@@ -132,6 +132,55 @@ fn trim(c: &mut Criterion) {
             assert_eq!("foo\tbar", corpus.trim());
         });
     });
+
+    // Note: probably not a good idea to check in directly,
+    // since it will cause this benchmark to fluctuate when
+    // ext_slice.rs changes size...
+    const SOURCE: &str = include_str!("../../src/ext_slice.rs");
+    fn source_lines() -> Vec<String> {
+        SOURCE.lines().map(|s| format!("{}\r\n", s)).collect::<Vec<_>>()
+    }
+    define(c, "bstr/trim", "source-lines", SOURCE.as_bytes(), move |b| {
+        let lines = source_lines();
+        b.iter(|| {
+            for line in &lines {
+                criterion::black_box(line.as_bytes().trim());
+            }
+        });
+    });
+    define(c, "std/trim", "source-lines", SOURCE.as_bytes(), move |b| {
+        let lines = source_lines();
+        b.iter(|| {
+            for line in &lines {
+                criterion::black_box(line.trim());
+            }
+        });
+    });
+    let large_ascii_padded = || format!("{0}x{0}", " \t\r\n".repeat(512));
+    define(
+        c,
+        "bstr/trim",
+        "large-ascii-padded",
+        large_ascii_padded().as_bytes(),
+        move |b| {
+            let corpus = large_ascii_padded();
+            b.iter(|| {
+                assert_eq!("x".as_bytes(), corpus.as_bytes().trim());
+            });
+        },
+    );
+    define(
+        c,
+        "std/trim",
+        "large-ascii-padded",
+        large_ascii_padded().as_bytes(),
+        move |b| {
+            let corpus = large_ascii_padded();
+            b.iter(|| {
+                assert_eq!("x", corpus.trim());
+            });
+        },
+    );
 }
 
 fn chars(c: &mut Criterion) {