Yan Zhao created ZOOKEEPER-4717:
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Summary: Cache serialize data in the request to avoid repeat
serialize.
Key: ZOOKEEPER-4717
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4717
Project: ZooKeeper
Issue Type: Improvement
Components: server
Affects Versions: 3.8.1
Reporter: Yan Zhao
Fix For: 3.8.2
For each request, it will be serialized three times.
1. Leader proposal. It will serialize the request, wrap the serialized data in
a proposal, then send the proposal to the quorum members.
2. SyncRequestProcessor append txn log. It will serialize the request, then
write the serialized data to the txn log.
3. ZkDataBase addCommittedProposal. It will serialize the request, wrap the
serialized data in a proposal, then add the proposal to committedLog.
Serialization operations are CPU-sensitive, and when the CPU experiences
jitter, the time required for serialization operations will also skyrocket.
Therefore, we should avoid serializing the same request multiple times.
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