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stream: reduce allocs in Reset()

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improvement:
```
benchmark               old ns/op     new ns/op     delta
BenchmarkHash8Bytes     21137         12201         -42.28%
BenchmarkHash1K         27235         14842         -45.50%
BenchmarkHash8K         38630         29034         -24.84%

benchmark               old MB/s     new MB/s     speedup
BenchmarkHash8Bytes     0.38         0.66         1.74x
BenchmarkHash1K         37.60        68.99        1.83x
BenchmarkHash8K         212.06       282.15       1.33x

benchmark               old allocs     new allocs     delta
BenchmarkHash8Bytes     10             9              -10.00%
BenchmarkHash1K         10             9              -10.00%
BenchmarkHash8K         9              8              -11.11%

benchmark               old bytes     new bytes     delta
BenchmarkHash8Bytes     16712         8520          -49.02%
BenchmarkHash1K         17728         9536          -46.21%
BenchmarkHash8K         16704         8512          -49.04%
```
This commit is contained in:
Vincent Batts 2015-08-16 18:59:09 -04:00
parent c5700a9f0d
commit fa4337c370
1 changed files with 3 additions and 2 deletions
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5
stream.go
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@ -49,8 +49,9 @@ type merkleHash struct {
}
func (mh *merkleHash) Reset() {
mh1 := newMerkleHash(mh.hm, mh.blockSize)
*mh = *mh1
mh.tree = &Tree{Nodes: []*Node{}, BlockLength: mh.blockSize}
mh.lastBlockLen = 0
mh.partialLastNode = false
}
func (mh merkleHash) Nodes() []*Node {