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package internal
import (
"bytes"
"sync"
)
var bytesBufferPool = sync.Pool{
New: func() interface{} {
return new(bytes.Buffer)
},
}
// NewBuffer retrieves a [bytes.Buffer] from a pool an re-initialises it.
//
// The returned buffer should be passed to [PutBuffer].
func NewBuffer(buf []byte) *bytes.Buffer {
wr := bytesBufferPool.Get().(*bytes.Buffer)
// Reinitialize the Buffer with a new backing slice since it is returned to
// the caller by wr.Bytes() below. Pooling is faster despite calling
// NewBuffer. The pooled alloc is still reused, it only needs to be zeroed.
*wr = *bytes.NewBuffer(buf)
return wr
}
// PutBuffer releases a buffer to the pool.
func PutBuffer(buf *bytes.Buffer) {
// Release reference to the backing buffer.
*buf = *bytes.NewBuffer(nil)
bytesBufferPool.Put(buf)
}
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