1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/rust/dtoa/benches/bench.rs b/third_party/rust/dtoa/benches/bench.rs
new file mode 100644
index 0000000000..ec57953563
--- /dev/null
+++ b/third_party/rust/dtoa/benches/bench.rs
@@ -0,0 +1,54 @@
+#![feature(test)]
+
+extern crate dtoa;
+extern crate test;
+
+macro_rules! benches {
+    ($($name:ident($value:expr),)*) => {
+        mod bench_dtoa {
+            use test::{Bencher, black_box};
+            $(
+                #[bench]
+                fn $name(b: &mut Bencher) {
+                    use dtoa;
+
+                    let mut buf = Vec::with_capacity(20);
+
+                    b.iter(|| {
+                        buf.clear();
+                        dtoa::write(&mut buf, black_box($value)).unwrap()
+                    });
+                }
+            )*
+        }
+
+        mod bench_fmt {
+            use test::{Bencher, black_box};
+            $(
+                #[bench]
+                fn $name(b: &mut Bencher) {
+                    use std::io::Write;
+
+                    let mut buf = Vec::with_capacity(20);
+
+                    b.iter(|| {
+                        buf.clear();
+                        write!(&mut buf, "{}", black_box($value)).unwrap()
+                    });
+                }
+            )*
+        }
+    }
+}
+
+benches!(
+    bench_0_f64(0f64),
+    bench_short_f64(0.1234f64),
+    bench_e_f64(2.718281828459045f64),
+    bench_max_f64(::std::f64::MAX),
+
+    bench_0_f32(0f32),
+    bench_short_f32(0.1234f32),
+    bench_e_f32(2.718281828459045f32),
+    bench_max_f32(::std::f32::MAX),
+);