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minor optimization

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This commit is contained in:
chrislu
2022-09-04 18:50:45 -07:00
parent 70777d9b9f
commit 8c5759a06d
1 changed files with 8 additions and 1 deletions
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9
weed/storage/volume_read.go
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@@ -107,7 +107,7 @@ func (v *Volume) readNeedleDataInto(n *needle.Needle, readOption *ReadOption, wr
readOption.IsOutOfRange = false readOption.IsOutOfRange = false
err = n.ReadNeedleMeta(v.DataBackend, nv.Offset.ToActualOffset(), readSize, v.Version()) err = n.ReadNeedleMeta(v.DataBackend, nv.Offset.ToActualOffset(), readSize, v.Version())
} }
buf := mem.Allocate(1024 * 1024) buf := mem.Allocate(min(1024*1024, int(size)))
defer mem.Free(buf) defer mem.Free(buf)
actualOffset := nv.Offset.ToActualOffset() actualOffset := nv.Offset.ToActualOffset()
if readOption.IsOutOfRange { if readOption.IsOutOfRange {
@@ -117,6 +117,13 @@ func (v *Volume) readNeedleDataInto(n *needle.Needle, readOption *ReadOption, wr
return n.ReadNeedleDataInto(v.DataBackend, actualOffset, buf, writer, offset, size) return n.ReadNeedleDataInto(v.DataBackend, actualOffset, buf, writer, offset, size)
} }
func min(x, y int) int {
if x < y {
return x
}
return y
}
// read fills in Needle content by looking up n.Id from NeedleMapper // read fills in Needle content by looking up n.Id from NeedleMapper
func (v *Volume) ReadNeedleBlob(offset int64, size Size) ([]byte, error) { func (v *Volume) ReadNeedleBlob(offset int64, size Size) ([]byte, error) {
v.dataFileAccessLock.RLock() v.dataFileAccessLock.RLock()