xinqiu.hu created HADOOP-18533:
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Summary: RPC Client performance improvement
Key: HADOOP-18533
URL: https://issues.apache.org/jira/browse/HADOOP-18533
Project: Hadoop Common
Issue Type: Improvement
Components: rpc-server
Reporter: xinqiu.hu
The current implementation copies the rpcRequest and header to a
ByteArrayOutputStream in order to calculate the total length of the sent
request, and then writes it to the socket buffer.
But if the rpc engine is ProtobufRpcEngine2, we can pre-calculate the request
size, and then send the request directly to the socket buffer, reducing a
memory copy.
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