Adding benchmarking to rust library.

git-svn-id: https://svn.rinrab.com/rinrab/xdigest/trunk@6673 0083e6b4-6090-234a-836e-88fcc467669c

Author: rinrab

Makefile

@@ -287,7 +287,7 @@ rust-build:
 	cd contrib/rust && cargo build
 
 rust-test:
-	cd contrib/rust && cargo test
+	cd contrib/rust && cargo test && cargo bench 
 
 rust-package: rust-copydist
 	cd contrib/rust/xdigest-src && cargo package

contrib/rust/xdigest/benches/mod.rs

@@ -0,0 +1,64 @@
+/*
+ * note: to compile this file, a nightly versin of rust compiler is required
+ * because the whole bench feature is considered unstable. why? no idea. 
+ */
+
+#![feature(test)]
+extern crate test;
+
+use xdigest::XDigest;
+
+fn create_buf(buf: &mut [u8]) {
+    let mut i = 0;
+    let mut seed: u32 = 67;
+
+    while (i < buf.len()) {
+        seed = (seed * 1103515245 + 12345) & 0xffffffff;
+        buf[i] = (seed & 0xff) as u8;
+        i += 1;
+    }
+}
+
+macro_rules! bench_update {
+    (
+        $init:expr,
+        $name:ident
+    ) => {
+        #[bench]
+        fn $name(b: &mut test::Bencher) {
+            let mut buf = [0u8; 1024 * 1024];
+            let mut i = 0;
+            let mut ctx = $init;
+
+            create_buf(&mut buf);
+
+            b.iter(|| {
+                ctx.update(&buf);
+                i += 1;
+            });
+            b.bytes = buf.len() as u64;
+
+            let _hash = ctx.finalise();
+        }
+    }
+}
+
+bench_update!(
+    xdigest::SHA256::new(),
+    sha256
+);
+
+bench_update!(
+    xdigest::SHA512::new(),
+    sha512
+);
+
+bench_update!(
+    xdigest::SHA1::new(),
+    sha1
+);
+
+bench_update!(
+    xdigest::MD5::new(),
+    md5
+);