Nao YONASHIRO f04f594a1f image/png: hoist repetitive pixels per byte out of loop in Encode ... The existing implementation has calculated pixels per byte for each pixel. reduce the calculation of pixels per byte. name old time/op new time/op delta EncodeGray-4 2.16ms ± 1% 2.16ms ± 1% -0.28% (p=0.000 n=86+84) EncodeGrayWithBufferPool-4 1.99ms ± 0% 1.97ms ± 0% -0.72% (p=0.000 n=97+92) EncodeNRGBOpaque-4 6.51ms ± 1% 6.48ms ± 1% -0.45% (p=0.000 n=90+85) EncodeNRGBA-4 7.33ms ± 1% 7.28ms ± 0% -0.69% (p=0.000 n=89+87) EncodePaletted-4 5.10ms ± 1% 2.29ms ± 0% -55.11% (p=0.000 n=90+85) EncodeRGBOpaque-4 6.51ms ± 1% 6.51ms ± 0% ~ (p=0.311 n=94+88) EncodeRGBA-4 24.3ms ± 2% 24.1ms ± 1% -0.87% (p=0.000 n=91+91) name old speed new speed delta EncodeGray-4 142MB/s ± 1% 143MB/s ± 1% +0.26% (p=0.000 n=86+85) EncodeGrayWithBufferPool-4 154MB/s ± 0% 156MB/s ± 0% +0.73% (p=0.000 n=97+92) EncodeNRGBOpaque-4 189MB/s ± 1% 190MB/s ± 1% +0.44% (p=0.000 n=90+86) EncodeNRGBA-4 168MB/s ± 1% 169MB/s ± 0% +0.69% (p=0.000 n=89+87) EncodePaletted-4 60.3MB/s ± 1% 134.2MB/s ± 0% +122.74% (p=0.000 n=90+85) EncodeRGBOpaque-4 189MB/s ± 1% 189MB/s ± 0% ~ (p=0.326 n=94+88) EncodeRGBA-4 50.6MB/s ± 2% 51.1MB/s ± 1% +0.87% (p=0.000 n=91+91) name old alloc/op new alloc/op delta EncodeGray-4 852kB ± 0% 852kB ± 0% +0.00% (p=0.000 n=100+100) EncodeGrayWithBufferPool-4 1.49kB ± 2% 1.47kB ± 1% -0.88% (p=0.000 n=95+90) EncodeNRGBOpaque-4 860kB ± 0% 860kB ± 0% +0.00% (p=0.003 n=98+58) EncodeNRGBA-4 864kB ± 0% 864kB ± 0% +0.00% (p=0.021 n=100+99) EncodePaletted-4 849kB ± 0% 849kB ± 0% +0.00% (p=0.040 n=100+100) EncodeRGBOpaque-4 860kB ± 0% 860kB ± 0% ~ (p=0.062 n=66+98) EncodeRGBA-4 3.32MB ± 0% 3.32MB ± 0% -0.00% (p=0.044 n=99+99) name old allocs/op new allocs/op delta EncodeGray-4 32.0 ± 0% 32.0 ± 0% ~ (all equal) EncodeGrayWithBufferPool-4 3.00 ± 0% 3.00 ± 0% ~ (all equal) EncodeNRGBOpaque-4 32.0 ± 0% 32.0 ± 0% ~ (all equal) EncodeNRGBA-4 32.0 ± 0% 32.0 ± 0% ~ (all equal) EncodePaletted-4 36.0 ± 0% 36.0 ± 0% ~ (all equal) EncodeRGBOpaque-4 32.0 ± 0% 32.0 ± 0% ~ (all equal) EncodeRGBA-4 614k ± 0% 614k ± 0% ~ (all equal) Change-Id: I716bde2dc80d8111d75d3d765fc09223f770d5a5 Reviewed-on: https://go-review.googlesource.com/c/go/+/187417 Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com> Reviewed-by: Nigel Tao <nigeltao@golang.org> Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>		2019-08-28 09:02:35 +00:00
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color	all: update comment URLs from HTTP to HTTPS, where possible	2018-06-01 21:52:00 +00:00
draw	image/draw: change argument type to be consistent with other args	2019-05-24 15:22:14 +00:00
gif	image/gif: fix transparency loss when encoding a wrapped *image.Paletted	2019-05-22 20:41:27 +00:00
internal/imageutil	all: fix non-standard "DO NOT EDIT" comments for generated files	2018-03-10 17:50:11 +00:00
jpeg	image/jpeg: reduce bound checks from idct and fdct	2019-04-02 23:18:37 +00:00
png	image/png: hoist repetitive pixels per byte out of loop in Encode	2019-08-28 09:02:35 +00:00
testdata	image/gif: fix transparency loss when encoding a wrapped *image.Paletted	2019-05-22 20:41:27 +00:00
decode_example_test.go	image: add an example that shows how to get the metadata of an image	2018-05-29 03:16:17 +00:00
decode_test.go	image: add missing error check in test	2019-05-23 15:51:48 +00:00
format.go	image: make RegisterFormat safe for concurrent use	2018-09-26 23:14:57 +00:00
geom.go	image: deprecate ZP and ZR	2019-04-07 03:44:17 +00:00
geom_test.go	image: fix the overlap check in Rectangle.Intersect.	2017-02-10 05:05:59 +00:00
image.go	image: optimize bounds checking for At and Set methods	2018-10-01 19:16:00 +00:00
image_test.go	image: avoid sharing test images between tests and benchmarks	2018-09-25 16:07:59 +00:00
names.go	…
ycbcr.go	…
ycbcr_test.go	…