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## Issue Description MetricSearcher findOffset eating 5%~15% CPU,because of DataInputStream#readLong   bug report ### Describe what happened 当MetricSearcher工作时,会占用5%~15%的CPU。访问量小的应用没有这种问题,但是部分访问量较高的应用会偶发这个问题,具体访问量是比如一分钟20万次被Sentinel管控的请求。我们有一些用应用单机QPS超过4万,这个问题便会持续出现 When MetricSearcher works, it consumes 5% to 15% of the CPU....
area/performance