tree b0f76651404446665969e3d7ad6ccf8c1234111f
parent 2c60a99f723e779a39664b5f12cb41878fd4a700
author Joe Tsai <joetsai@digital-static.net> 1630034792 -0700
committer Joe Tsai <joetsai@digital-static.net> 1630051301 +0000

encoding/gob: optimize decoding of []byte

The reflect.Value.Slice method unfortunately allocates every time
since it needs to place the slice header on the heap.
This is silly since gob immediately stores the result back into slice.
Instead, use the reflect.Value.SetLen method.

DecodeBytesSlice  75.0µs ± 2%  35.2µs ± 6%  -53.02%

Change-Id: I3ca0529d01bf978f2b76e215f52d369f458951ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/345572
Trust: Joe Tsai <joetsai@digital-static.net>
Run-TryBot: Joe Tsai <joetsai@digital-static.net>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>