pnowojski commented on a change in pull request #6417: [FLINK-9913][runtime]
Improve output serialization only once in RecordWriter
URL: https://github.com/apache/flink/pull/6417#discussion_r209290136
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordWriterTest.java
##########
@@ -524,6 +615,31 @@ public void read(DataInputView in) throws IOException {
}
}
+ /**
+ * Broadcast channel selector that selects all the output channels.
+ */
+ private static class Broadcast<T extends IOReadableWritable> implements
ChannelSelector<T> {
+
+ private int[] returnChannel;
+ boolean set;
Review comment:
1. do we need to cache `returnChannel`? Does it give any meaningful test
execution speed up?
2. if so, instead of using `set` and `setNumber`, just check whether
`returnChannel.length == numberOfOutputChannels`. If not, create new one.
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