java - ThreadPoolExecutor.worker.run spends too much time -

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i have several tasks executed in cachedthreadpool. after profiling found task runs 10% of time , other 90% used threadpoolexecutor$worker.run (i'm using jvisualvm profiling).

and here i'm stuck. can't figure out hell threadpoolexecutor$worker.run doing, why consumes time , how fix problem. need tasks run fast possible.

that's profiler says:

pool-2-thread-2                                          44542 ms (100%)     java.util.concurrent.threadpoolexecutor$worker.run   44542 ms (100%)         self time                                        39598 ms (88.9%)         myclass.run                                       4943 ms (11.1%)

may self time means thread sleeping?

thanks in advance. p.s. please sorry stupid, i'm not great java programmer.


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