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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2021/11/29 05:47:50 UTC

[GitHub] [rocketmq] XiaoyiPeng commented on issue #3533: It is better to specify the initialCapacity when initializing a HashMap as a local variable that will not add elements in the future

XiaoyiPeng commented on issue #3533:
URL: https://github.com/apache/rocketmq/issues/3533#issuecomment-981310792


   > some advices. If there are for four elements ,the capacity should be larger than four to prevent expansion
   
   Use the style of the previous code(like` org.apache.rocketmq.broker.filter.MessageEvaluationContext#keyValues()` ), the `loadFactor` of `HashMap` has been set to 1 and will not be expanded.


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