Benchmark ryu

Author: dtolnay

Cargo.toml

@@ -9,3 +9,6 @@ documentation = "https://github.com/dtolnay/dtoa"
 categories = ["value-formatting"]
 readme = "README.md"
 exclude = ["performance.png"]
+
+[dev-dependencies]
+ryu = { path = "../ryu" }

benches/bench.rs

@@ -38,6 +38,26 @@ macro_rules! benches {
                 }
             )*
         }
+
+        mod bench_ryu {
+            extern crate ryu;
+            use test::{Bencher, black_box};
+            $(
+                #[bench]
+                fn $name(b: &mut Bencher) {
+                    use std::io::Write;
+
+                    let mut buf = Vec::with_capacity(20);
+
+                    b.iter(|| {
+                        buf.clear();
+                        let mut bytes = [0u8; 24];
+                        let n = unsafe { ryu::d2s_buffered_n(black_box($value), &mut bytes[0]) };
+                        buf.write_all(&bytes[..n]).unwrap();
+                    });
+                }
+            )*
+        }
     }
 }
 
@@ -47,8 +67,10 @@ benches!(
     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),
+    */
 );