fix: avoid allocating cids (ipfs#348)

This commit was moved from ipfs/go-bitswap@906b2fb
Jorropo · Apr 13, 2020 · a1b6ce9 · a1b6ce9
1 parent 2fb1ad8
commit a1b6ce9
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/bitswap/message/pb/cid.go b/bitswap/message/pb/cid.go
@@ -18,7 +18,8 @@ func (c Cid) Marshal() ([]byte, error) {
 }
 
 func (c *Cid) MarshalTo(data []byte) (int, error) {
-	return copy(data[:c.Size()], c.Cid.Bytes()), nil
+	// intentionally using KeyString here to avoid allocating.
+	return copy(data[:c.Size()], c.Cid.KeyString()), nil
 }
 
 func (c *Cid) Unmarshal(data []byte) (err error) {