Github user lizhanhui commented on the issue:
https://github.com/apache/incubator-rocketmq/pull/61
This PR itself is OK. Abstracting the concept of`PutMessageLock` is pretty
handy.
What I suggest here is presenting the advice more formally instead of a
simple inline comment. Preferably, we may create a blog, backed up with real
experiment data, suggesting decision-making process between spin-lock and
mutex-lock.
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