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  1. JDK
  2. JDK-8151751 Stack trace population code can (re-)use cached Strings
  3. JDK-8216302

StackTraceElement::fill_in can use cached Class.name

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    • b03

        This is the simple subtask from JDK-8151751. Class.name is already cached on Java side, so field is available for caching the name. We can use that field when creating the stack trace elements.

        Candidate patch gives a very nice result:

        Benchmark (depth) Mode Cnt Score Error Units

        # 8u192
        StackTraceBench.test 1 avgt 15 10.851 ± 0.075 us/op
        StackTraceBench.test 10 avgt 15 15.325 ± 0.089 us/op
        StackTraceBench.test 100 avgt 15 59.717 ± 0.449 us/op
        StackTraceBench.test 1000 avgt 15 529.020 ± 3.654 us/op

        # jdk/jdk, baseline
        StackTraceBench.test 1 avgt 15 23.835 ± 0.188 us/op
        StackTraceBench.test 10 avgt 15 33.204 ± 0.191 us/op
        StackTraceBench.test 100 avgt 15 125.195 ± 0.694 us/op
        StackTraceBench.test 1000 avgt 15 1051.047 ± 9.779 us/op

        # jdk/jdk, patched
        StackTraceBench.test 1 avgt 15 14.450 ± 0.136 us/op
        StackTraceBench.test 10 avgt 15 20.182 ± 0.088 us/op
        StackTraceBench.test 100 avgt 15 77.107 ± 0.632 us/op
        StackTraceBench.test 1000 avgt 15 647.128 ± 6.159 us/op

              shade Aleksey Shipilev
              shade Aleksey Shipilev
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                Updated:
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