tree c1b51e5c447b2032faa4293d50280aefbea5a959
parent 0b2ca9e62f778adb95c31e57e120ef1cbfc42b25
author Nigel Tao <nigeltao@golang.org> 1349565677 +1100
committer Nigel Tao <nigeltao@golang.org> 1349565677 +1100
golang-hg b32301e110256cb55d78f41c280e4cdba424a3f2

image/jpeg: add DCT tests, do a small optimization (common sub-expression
elimination) in idct.go.

benchmark                   old ns/op    new ns/op    delta
BenchmarkIDCT                    5649         5610   -0.69%
BenchmarkDecodeRGBOpaque      2948607      2941051   -0.26%

The "type block" declaration moved so that idct.go is compilable
as a stand-alone file: "go tool 6g -S idct.go" works.

R=r
CC=golang-dev
https://golang.org/cl/6619056