remove bytes.Copy

replace all calls with calls to copy
use copy in regexp and bytes.Buffer

R=rsc
CC=golang-dev
http://codereview.appspot.com/157073

1 files changed, 4 insertions, 3 deletions

diff --git a/src/pkg/bytes/buffer.go b/src/pkg/bytes/buffer.go
index 76d67e777..0bbc06c32 100644
--- a/src/pkg/bytes/buffer.go
+++ b/src/pkg/bytes/buffer.go
@@ -20,10 +20,11 @@ func copyString(dst []byte, doff int, str string) {
 
 // Copy from bytes to byte array at offset doff.  Assume there's room.
 func copyBytes(dst []byte, doff int, src []byte) {
-	for soff := 0; soff < len(src); soff++ {
-		dst[doff] = src[soff];
-		doff++;
+	if len(src) == 1 {
+		dst[doff] = src[0];
+		return;
 	}
+	copy(dst[doff:len(dst)], src);
 }
 
 // A Buffer is a variable-sized buffer of bytes