James Robinson 193d09a659 compress/flate: add Reset() to allow reusing large buffers to compress multiple buffers ... This adds a Reset() to compress/flate's decompressor and plumbs that through to compress/zlib and compress/gzip's Readers so callers can avoid large allocations when performing many inflate operations. In particular this preserves the allocation of the decompressor.hist buffer, which is 32kb and overwritten as needed while inflating. On the benchmark described in issue 6317, produces the following speedup on my 2.3ghz Intel Core i7 MBP with go version devel +6b696a34e0af Sun Aug 03 15:14:59 2014 -0700 darwin/amd64: blocked.text w/out patch vs blocked.text w/ patch: benchmark old ns/op new ns/op delta BenchmarkGunzip 8371577533 7927917687 -5.30% benchmark old allocs new allocs delta BenchmarkGunzip 176818 148519 -16.00% benchmark old bytes new bytes delta BenchmarkGunzip 292184936 12739528 -95.64% flat.text vs blocked.text w/patch: benchmark old ns/op new ns/op delta BenchmarkGunzip 7939447827 7927917687 -0.15% benchmark old allocs new allocs delta BenchmarkGunzip 90702 148519 +63.74% benchmark old bytes new bytes delta BenchmarkGunzip 9959528 12739528 +27.91% Similar speedups to those bradfitz saw in https://golang.org/cl/13416045. Fixes #6317. Fixes #7950. LGTM=nigeltao R=golang-codereviews, bradfitz, dan.kortschak, adg, nigeltao, jamesr CC=golang-codereviews https://golang.org/cl/97140043		2014-10-20 12:58:02 +11:00
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example_test.go	build: move package sources from src/pkg to src	2014-09-08 00:08:51 -04:00
reader_test.go	build: move package sources from src/pkg to src	2014-09-08 00:08:51 -04:00
reader.go	compress/flate: add Reset() to allow reusing large buffers to compress multiple buffers	2014-10-20 12:58:02 +11:00
writer_test.go	build: move package sources from src/pkg to src	2014-09-08 00:08:51 -04:00
writer.go	build: move package sources from src/pkg to src	2014-09-08 00:08:51 -04:00