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Micro-optimization for hashing.Writer/PackerManager
name old time/op new time/op delta PackerManager-8 247ms ± 1% 246ms ± 1% -0.43% (p=0.001 n=18+18) name old speed new speed delta PackerManager-8 213MB/s ± 1% 214MB/s ± 1% +0.43% (p=0.001 n=18+18) name old alloc/op new alloc/op delta PackerManager-8 92.2kB ± 0% 91.5kB ± 0% -0.82% (p=0.000 n=19+20) name old allocs/op new allocs/op delta PackerManager-8 1.43k ± 0% 1.41k ± 0% -1.67% (p=0.000 n=20+20)
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1 changed files with 2 additions and 1 deletions
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@ -15,13 +15,14 @@ type Writer struct {
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func NewWriter(w io.Writer, h hash.Hash) *Writer {
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func NewWriter(w io.Writer, h hash.Hash) *Writer {
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return &Writer{
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return &Writer{
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h: h,
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h: h,
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w: io.MultiWriter(w, h),
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w: w,
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}
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}
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}
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}
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// Write wraps the write method of the underlying writer and also hashes all data.
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// Write wraps the write method of the underlying writer and also hashes all data.
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func (h *Writer) Write(p []byte) (int, error) {
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func (h *Writer) Write(p []byte) (int, error) {
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n, err := h.w.Write(p)
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n, err := h.w.Write(p)
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h.h.Write(p[:n])
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return n, err
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return n, err
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}
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}
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