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Use pooled buffer for flushing encrypted message blocks #3975

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Mar 16, 2023
Merged

Use pooled buffer for flushing encrypted message blocks #3975

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13 changes: 7 additions & 6 deletions server/filestore.go
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Expand Up @@ -3993,16 +3993,17 @@ func (mb *msgBlock) flushPendingMsgsLocked() (*LostStreamData, error) {

// Check if we need to encrypt.
if mb.bek != nil && lob > 0 {
const rsz = 32 * 1024 // 32k
var rdst [rsz]byte
// Need to leave original alone.
var dst []byte
if lob > rsz {
dst = make([]byte, lob)
if lob <= defaultLargeBlockSize {
dst = getMsgBlockBuf(lob)[:lob]
} else {
dst = rdst[:lob]
dst = make([]byte, lob)
}
// Need to leave original alone.
mb.bek.XORKeyStream(dst, buf)
if cap(buf) <= defaultLargeBlockSize {
recycleMsgBlockBuf(buf)
}
buf = dst
}

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