bytes: removed unnecessary slicing on copy

Change-Id: Ia42e3479c852a88968947411de8b32e5bcda5ae3
Reviewed-on: https://go-review.googlesource.com/64371
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/bytes/buffer.go b/src/bytes/buffer.go
index 67566a13d9288593b4310505afc7ef8193c6ad47..099e431a3625736eced984b3dbedcd1241eb00bf 100644 (file)
--- a/src/bytes/buffer.go
+++ b/src/bytes/buffer.go
@@ -131,7 +131,7 @@ func (b *Buffer) grow(n int) int {
                // slice. We only need m+n <= c to slide, but
                // we instead let capacity get twice as large so we
                // don't spend all our time copying.
-               copy(b.buf[:], b.buf[b.off:])
+               copy(b.buf, b.buf[b.off:])
        } else if c > maxInt-c-n {
                panic(ErrTooLarge)
        } else {