added benches

benches/hex.rs

@@ -0,0 +1,28 @@
+#![feature(test)]
+
+extern crate test;
+extern crate rustc_hex as hex;
+
+use test::Bencher;
+use hex::{FromHex, ToHex};
+
+#[bench]
+fn bench_to_hex(b: &mut Bencher) {
+    let s = "イロハニホヘト チリヌルヲ ワカヨタレソ ツネナラム \
+             ウヰノオクヤマ ケフコエテ アサキユメミシ ヱヒモセスン";
+    b.iter(|| {
+        s.as_bytes().to_hex();
+    });
+    b.bytes = s.len() as u64;
+}
+
+#[bench]
+fn bench_from_hex(b: &mut Bencher) {
+    let s = "イロハニホヘト チリヌルヲ ワカヨタレソ ツネナラム \
+             ウヰノオクヤマ ケフコエテ アサキユメミシ ヱヒモセスン";
+    let sb = s.as_bytes().to_hex();
+    b.iter(|| {
+        sb.from_hex().unwrap();
+    });
+    b.bytes = sb.len() as u64;
+}