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I have modified the JMH benchmark to look at latency (by measuring throughput) for executing a job with low, medium and high concurrency. It looks like the JREs threadpool is not so bad in some load ranges, but once things get busy we are still a bit better. No significant difference is seen between previous QTP impl and the one in this PR. ``` Benchmark (size) (type) Mode Cnt Score Error Units ThreadPoolBenchmark.testFew 200 ETP thrpt 3 129113.271 ± 10821.235 ops/s ThreadPoolBenchmark.testFew 200 QTP thrpt 3 122970.794 ± 8702.327 ops/s ThreadPoolBenchmark.testFew 200 QTP+ thrpt 3 121408.662 ± 12420.318 ops/s ThreadPoolBenchmark.testSome 200 ETP thrpt 3 277400.574 ± 34433.710 ops/s ThreadPoolBenchmark.testSome 200 QTP thrpt 3 244056.673 ± 60118.319 ops/s ThreadPoolBenchmark.testSome 200 QTP+ thrpt 3 240686.913 ± 43104.941 ops/s ThreadPoolBenchmark.testMany 200 ETP thrpt 3 679336.308 ± 157389.044 ops/s ThreadPoolBenchmark.testMany 200 QTP thrpt 3 704502.083 ± 15624.325 ops/s ThreadPoolBenchmark.testMany 200 QTP+ thrpt 3 708220.737 ± 3254.264 ops/s ``` Signed-off-by: Greg Wilkins <gregw@webtide.com>