Cezar Sa Espinola 93a18acf1e image/png: reduce memory allocs encoding images by reusing buffers ... This change allows greatly reducing memory allocations with a slightly performance improvement as well. Instances of (*png).Encoder can have a optional BufferPool attached to them. This allows reusing temporary buffers used when encoding a new image. This buffers include instances to zlib.Writer and bufio.Writer. Also, buffers for current and previous rows are saved in the encoder instance and reused as long as their cap() is enough to fit the current image row. A new benchmark was added to demonstrate the performance improvement when setting a BufferPool to an Encoder instance: $ go test -bench BenchmarkEncodeGray -benchmem BenchmarkEncodeGray-4 1000 2349584 ns/op 130.75 MB/s 852230 B/op 32 allocs/op BenchmarkEncodeGrayWithBufferPool-4 1000 2241650 ns/op 137.04 MB/s 900 B/op 3 allocs/op Change-Id: I4488201ae53cb2ad010c68c1e0118ee12beae14e Reviewed-on: https://go-review.googlesource.com/34150 Reviewed-by: Nigel Tao <nigeltao@golang.org> Run-TryBot: Nigel Tao <nigeltao@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>		2017-02-12 05:40:47 +00:00
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color	image/color: tweak the YCbCr to RGBA conversion formula again.	2017-02-10 22:57:50 +00:00
draw	image/draw: add FloydSteinberg Drawer example	2016-09-21 00:08:58 +00:00
gif	image/gif: fix frame-inside-image bounds checking.	2017-02-10 03:31:09 +00:00
internal/imageutil	image/color: tweak the YCbCr to RGBA conversion formula again.	2017-02-10 22:57:50 +00:00
jpeg	image/jpeg: improve performance when encoding *image.YCbCr	2017-02-01 21:38:59 +00:00
png	image/png: reduce memory allocs encoding images by reusing buffers	2017-02-12 05:40:47 +00:00
testdata	image/jpeg: reconstruct progressive images even if incomplete.	2016-03-31 00:33:24 +00:00
decode_example_test.go
decode_test.go	image/jpeg: reconstruct progressive images even if incomplete.	2016-03-31 00:33:24 +00:00
format.go
geom_test.go	image: fix the overlap check in Rectangle.Intersect.	2017-02-10 05:05:59 +00:00
geom.go	image: fix the overlap check in Rectangle.Intersect.	2017-02-10 05:05:59 +00:00
image_test.go
image.go
names.go
ycbcr_test.go
ycbcr.go