WIP

bson/marshal.go

@@ -78,9 +78,10 @@ func MarshalValue(val interface{}) (bsontype.Type, []byte, error) {
 // Deprecated: Using a custom registry to marshal individual BSON values will not be supported in Go
 // Driver 2.0.
 func MarshalValueWithRegistry(r *bsoncodec.Registry, val interface{}) (bsontype.Type, []byte, error) {
-	sw := new(bsonrw.SliceWriter)
-	*sw = make([]byte, 0)
-	vwFlusher := bvwPool.GetAtModeElement(sw)
+	// sw := new(bsonrw.SliceWriter)
+	// *sw = make([]byte, 0)
+	var sw bsonrw.SliceWriter
+	vwFlusher := bvwPool.GetAtModeElement(&sw)
 
 	// get an Encoder and encode the value
 	enc := encPool.Get().(*Encoder)
@@ -97,8 +98,8 @@ func MarshalValueWithRegistry(r *bsoncodec.Registry, val interface{}) (bsontype.
 	if err := vwFlusher.Flush(); err != nil {
 		return 0, nil, err
 	}
-	buffer := *sw
-	return bsontype.Type(buffer[0]), buffer[2:], nil
+	// buffer := *sw
+	return bsontype.Type(sw[0]), sw[2:], nil
 }
 
 // MarshalValueWithContext returns the BSON encoding of val using EncodeContext ec.