go /
go /
8bd5089513a668ed3d9600d3cd60e200708bed0d image: change Pix from []FooColor to []uint8.
Some benchmark numbers below. The image/draw fast-paths show dramatic
improvement, the generic slow-paths show a smaller slow-down.
BEFORE
png.BenchmarkEncodePaletted 200 8203800 ns/op 37.45 MB/s
png.BenchmarkEncodeRGBOpaque 100 26940440 ns/op 45.61 MB/s
png.BenchmarkEncodeRGBA 20 73821000 ns/op 16.65 MB/s
jpeg.BenchmarkEncodeRGBOpaque 50 35598640 ns/op 34.52 MB/s
draw.BenchmarkFillOver 500 4024226 ns/op
draw.BenchmarkFillSrc 10000 152736 ns/op
draw.BenchmarkCopyOver 500 3452824 ns/op
draw.BenchmarkCopySrc 50000 73218 ns/op
draw.BenchmarkNRGBAOver 500 3941234 ns/op
draw.BenchmarkNRGBASrc 1000 2484400 ns/op
draw.BenchmarkYCbCr 1000 2609005 ns/op
draw.BenchmarkGlyphOver 2000 1169575 ns/op
draw.BenchmarkRGBA 200 9031390 ns/op
draw.BenchmarkGenericOver 50 34636620 ns/op
draw.BenchmarkGenericMaskOver 100 16561150 ns/op
draw.BenchmarkGenericSrc 100 13873760 ns/op
draw.BenchmarkGenericMaskSrc 100 25198860 ns/op
AFTER
png.BenchmarkEncodePaletted 200 8206600 ns/op 37.43 MB/s
png.BenchmarkEncodeRGBOpaque 100 26129530 ns/op 47.03 MB/s
png.BenchmarkEncodeRGBA 20 75776750 ns/op 16.22 MB/s
jpeg.BenchmarkEncodeRGBOpaque 50 37192940 ns/op 33.04 MB/s
draw.BenchmarkFillOver 500 3008134 ns/op
draw.BenchmarkFillSrc 10000 154214 ns/op
draw.BenchmarkCopyOver 1000 2169988 ns/op
draw.BenchmarkCopySrc 50000 73095 ns/op
draw.BenchmarkNRGBAOver 1000 2491079 ns/op
draw.BenchmarkNRGBASrc 2000 1361244 ns/op
draw.BenchmarkYCbCr 1000 2554269 ns/op
draw.BenchmarkGlyphOver 2000 1042225 ns/op
draw.BenchmarkRGBA 100 10233340 ns/op
draw.BenchmarkGenericOver 50 38421560 ns/op
draw.BenchmarkGenericMaskOver 100 17521190 ns/op
draw.BenchmarkGenericSrc 100 16351200 ns/op
draw.BenchmarkGenericMaskSrc 100 26538190 ns/op
R=r
CC=golang-dev
https://golang.org/cl/4675076
8 files changed
