1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/rust/mime_guess/benches/benchmark.rs b/third_party/rust/mime_guess/benches/benchmark.rs
new file mode 100644
index 0000000000..4a7af2e584
--- /dev/null
+++ b/third_party/rust/mime_guess/benches/benchmark.rs
@@ -0,0 +1,31 @@
+#[macro_use]
+extern crate criterion;
+extern crate mime_guess;
+
+use self::criterion::Criterion;
+
+use mime_guess::from_ext;
+
+include!("../src/mime_types.rs");
+
+/// WARNING: this may take a while!
+fn bench_mime_str(c: &mut Criterion) {
+    c.bench_function("from_ext", |b| {
+        for (mime_ext, _) in MIME_TYPES {
+            b.iter(|| from_ext(mime_ext).first_raw());
+        }
+    });
+}
+
+fn bench_mime_str_uppercase(c: &mut Criterion) {
+    c.bench_function("from_ext uppercased", |b| {
+        let uppercased = MIME_TYPES.into_iter().map(|(s, _)| s.to_uppercase());
+
+        for mime_ext in uppercased {
+            b.iter(|| from_ext(&mime_ext).first_raw());
+        }
+    });
+}
+
+criterion_group!(benches, bench_mime_str, bench_mime_str_uppercase);
+criterion_main!(benches);