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Merge pull request #54 from mtrmac/allocations

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Avoid a 32 kB file allocation on every bitBucketFilePutter.Put
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Vincent Batts 2021-08-23 06:18:35 -04:00 committed by GitHub
commit 80a436fd61
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1 changed files with 2 additions and 1 deletions
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tar/storage/getter.go
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@ -92,11 +92,12 @@ func NewDiscardFilePutter() FilePutter {
} }
type bitBucketFilePutter struct { type bitBucketFilePutter struct {
buffer [32 * 1024]byte // 32 kB is the buffer size currently used by io.Copy, as of August 2021.
} }
func (bbfp *bitBucketFilePutter) Put(name string, r io.Reader) (int64, []byte, error) { func (bbfp *bitBucketFilePutter) Put(name string, r io.Reader) (int64, []byte, error) {
c := crc64.New(CRCTable) c := crc64.New(CRCTable)
i, err := io.Copy(c, r) i, err := io.CopyBuffer(c, r, bbfp.buffer[:])
return i, c.Sum(nil), err return i, c.Sum(nil), err
} }