Github user StefanRRichter commented on a diff in the pull request:
https://github.com/apache/flink/pull/5582#discussion_r191444464
--- Diff:
flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBKeySerializationUtils.java
---
@@ -138,4 +138,12 @@ private static void writeVariableIntBytes(
value >>>= 8;
} while (value != 0);
}
+
+ public static byte[] serializeKeyGroup(int keyGroup, int
keyGroupPrefixBytes) {
+ byte[] startKeyGroupPrefixBytes = new byte[keyGroupPrefixBytes];
--- End diff --
Maybe we can rather pass the `startKeyGroupPrefixBytes` array directly
instead of creating it in every invocation from `keyGroupPrefixBytes`. Like
that, the caller can reuse the same array.
---
