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fix: minor allocation improvements in xlMetaV2 (#12133)

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This commit is contained in:
Klaus Post
2021-05-07 18:11:05 +02:00
committed by GitHub
parent 0bab1c1895
commit 254698f126
5 changed files with 69 additions and 36 deletions
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6
cmd/storage-rest-server.go
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@@ -852,6 +852,8 @@ func streamHTTPResponse(w http.ResponseWriter) *httpStreamResponse {
// The returned reader contains the payload and must be closed if no error is returned.
func waitForHTTPStream(respBody io.ReadCloser, w io.Writer) error {
var tmp [1]byte
// 8K copy buffer, reused for less allocs...
var buf [8 << 10]byte
for {
_, err := io.ReadFull(respBody, tmp[:])
if err != nil {
@@ -861,7 +863,7 @@ func waitForHTTPStream(respBody io.ReadCloser, w io.Writer) error {
switch tmp[0] {
case 0:
// 0 is unbuffered, copy the rest.
_, err := io.Copy(w, respBody)
_, err := io.CopyBuffer(w, respBody, buf[:])
if err == io.EOF {
return nil
}
@@ -880,7 +882,7 @@ func waitForHTTPStream(respBody io.ReadCloser, w io.Writer) error {
return err
}
length := binary.LittleEndian.Uint32(tmp[:])
_, err = io.CopyN(w, respBody, int64(length))
_, err = io.CopyBuffer(w, io.LimitReader(respBody, int64(length)), buf[:])
if err != nil {
return err
}