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_r215613344
########## File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/api/writer/RecordWriter.java ########## @@ -89,77 +88,101 @@ public RecordWriter(ResultPartitionWriter writer, ChannelSelector<T> channelSele this.numChannels = writer.getNumberOfSubpartitions(); - /* - * The runtime exposes a channel abstraction for the produced results - * (see {@link ChannelSelector}). Every channel has an independent - * serializer. - */ - this.serializers = new SpanningRecordSerializer[numChannels]; + this.serializer = new SpanningRecordSerializer<T>(); this.bufferBuilders = new Optional[numChannels]; + this.broadcastChannels = new int[numChannels]; for (int i = 0; i < numChannels; i++) { - serializers[i] = new SpanningRecordSerializer<T>(); + broadcastChannels[i] = i; bufferBuilders[i] = Optional.empty(); } } public void emit(T record) throws IOException, InterruptedException { - for (int targetChannel : channelSelector.selectChannels(record, numChannels)) { - sendToTarget(record, targetChannel); - } + emitToTargetChannels(record, channelSelector.selectChannels(record, numChannels)); } /** * This is used to broadcast Streaming Watermarks in-band with records. This ignores * the {@link ChannelSelector}. */ public void broadcastEmit(T record) throws IOException, InterruptedException { - for (int targetChannel = 0; targetChannel < numChannels; targetChannel++) { - sendToTarget(record, targetChannel); - } + emitToTargetChannels(record, broadcastChannels); } /** * This is used to send LatencyMarks to a random target channel. */ public void randomEmit(T record) throws IOException, InterruptedException { - sendToTarget(record, rng.nextInt(numChannels)); + serializer.serializeRecord(record); + + if (copyToTargetBuffers(rng.nextInt(numChannels))) { + serializer.prune(); + } } - private void sendToTarget(T record, int targetChannel) throws IOException, InterruptedException { - RecordSerializer<T> serializer = serializers[targetChannel]; + private void emitToTargetChannels(T record, int[] targetChannels) throws IOException, InterruptedException { Review comment: maybe rename just to `emit`? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services