[GitHub] [incubator-doris] caiconghui opened a new issue #4132: Use LongAdder or volatile long to replace AtomicLong in some scenarios

[GitBox <gi...@apache.org>]

caiconghui opened a new issue #4132:
URL: https://github.com/apache/incubator-doris/issues/4132


   In the statistical summation scenario, LongAdder(introduced by jdk1.8) has better performance than AtomicLong in high concurrency update scenario. And if we just want to keep get and set operation for variable to be atomic, just add volatile at the front of the variable is enough, use AtomicLong is a little heavy.


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