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compress/flate: shrink decompressor struct for better performance

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Helps with issue 2703.

R=dave, minux.ma, rsc
CC=golang-dev
https://golang.org/cl/5536078
This commit is contained in:
Ryan Hitchman 2012-11-01 13:57:24 -04:00 committed by Russ Cox
parent 85d60a727c
commit c7873ff2a6
1 changed files with 6 additions and 2 deletions
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8
src/pkg/compress/flate/inflate.go
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@ -208,8 +208,8 @@ type decompressor struct {
h1, h2 huffmanDecoder
// Length arrays used to define Huffman codes.
bits [maxLit + maxDist]int
codebits [numCodes]int
bits *[maxLit + maxDist]int
codebits *[numCodes]int
// Output history, buffer.
hist *[maxHist]byte
@ -692,6 +692,8 @@ func makeReader(r io.Reader) Reader {
// finished reading.
func NewReader(r io.Reader) io.ReadCloser {
var f decompressor
f.bits = new([maxLit + maxDist]int)
f.codebits = new([numCodes]int)
f.r = makeReader(r)
f.hist = new([maxHist]byte)
f.step = (*decompressor).nextBlock
@ -707,6 +709,8 @@ func NewReaderDict(r io.Reader, dict []byte) io.ReadCloser {
var f decompressor
f.r = makeReader(r)
f.hist = new([maxHist]byte)
f.bits = new([maxLit + maxDist]int)
f.codebits = new([numCodes]int)
f.step = (*decompressor).nextBlock
f.setDict(dict)
return &f