[GitHub] [commons-lang] XenoAmess commented on pull request #611: [LANG-1601] Refine performance of fraction.pow

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

XenoAmess commented on pull request #611:
URL: https://github.com/apache/commons-lang/pull/611#issuecomment-679357467


   ```
   [INFO] --- exec-maven-plugin:1.6.0:exec (benchmark) @ commons-lang3 ---
   # JMH version: 1.21
   # VM version: JDK 1.8.0_265, OpenJDK 64-Bit Server VM, 25.265-b01
   # VM invoker: C:\jdk8u265-b01\jre\bin\java.exe
   # VM options: -server -Xms2048M -Xms2048M
   # Warmup: 5 iterations, 10 s each
   # Measurement: 5 iterations, 10 s each
   # Timeout: 10 min per iteration
   # Threads: 1 thread, will synchronize iterations
   # Benchmark mode: Average time, time/op
   # Benchmark: org.apache.commons.lang3.math.FractionPowPerformanceTest.testNew
   
   # Run progress: 0.00% complete, ETA 00:03:20
   # Fork: 1 of 1
   # Warmup Iteration   1: 132128.103 ns/op
   # Warmup Iteration   2: 137977.136 ns/op
   # Warmup Iteration   3: 126261.936 ns/op
   # Warmup Iteration   4: 126523.312 ns/op
   # Warmup Iteration   5: 128990.556 ns/op
   Iteration   1: 124878.319 ns/op
   Iteration   2: 124090.416 ns/op
   Iteration   3: 125770.206 ns/op
   Iteration   4: 128675.569 ns/op
   Iteration   5: 125295.804 ns/op
   Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
   
   
   Result "org.apache.commons.lang3.math.FractionPowPerformanceTest.testNew":
     125742.063 (99.9%) 6746.705 ns/op [Average]
     (min, avg, max) = (124090.416, 125742.063, 128675.569), stdev = 1752.098
     CI (99.9%): [118995.358, 132488.767] (assumes normal distribution)
   
   
   # JMH version: 1.21
   # VM version: JDK 1.8.0_265, OpenJDK 64-Bit Server VM, 25.265-b01
   # VM invoker: C:\jdk8u265-b01\jre\bin\java.exe
   # VM options: -server -Xms2048M -Xms2048M
   # Warmup: 5 iterations, 10 s each
   # Measurement: 5 iterations, 10 s each
   # Timeout: 10 min per iteration
   # Threads: 1 thread, will synchronize iterations
   # Benchmark mode: Average time, time/op
   # Benchmark: org.apache.commons.lang3.math.FractionPowPerformanceTest.testOld
   
   # Run progress: 50.00% complete, ETA 00:01:40
   # Fork: 1 of 1
   # Warmup Iteration   1: 135318.147 ns/op
   # Warmup Iteration   2: 133351.865 ns/op
   # Warmup Iteration   3: 134188.392 ns/op
   # Warmup Iteration   4: 133996.330 ns/op
   # Warmup Iteration   5: 135188.800 ns/op
   Iteration   1: 134099.421 ns/op
   Iteration   2: 136008.100 ns/op
   Iteration   3: 135618.528 ns/op
   Iteration   4: 135300.828 ns/op
   Iteration   5: 135550.413 ns/op
   Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
   
   
   Result "org.apache.commons.lang3.math.FractionPowPerformanceTest.testOld":
     135315.458 (99.9%) 2793.886 ns/op [Average]
     (min, avg, max) = (134099.421, 135315.458, 136008.100), stdev = 725.563
     CI (99.9%): [132521.572, 138109.344] (assumes normal distribution)
   
   
   # Run complete. Total time: 00:03:21
   
   REMEMBER: The numbers below are just data. To gain reusable insights, you need to follow up on
   why the numbers are the way they are. Use profilers (see -prof, -lprof), design factorial
   experiments, perform baseline and negative tests that provide experimental control, make sure
   the benchmarking environment is safe on JVM/OS/HW level, ask for reviews from the domain experts.
   Do not assume the numbers tell you what you want them to tell.
   
   Benchmark                           Mode  Cnt       Score      Error  Units
   FractionPowPerformanceTest.testNew  avgt    5  125742.063  6746.705  ns/op
   FractionPowPerformanceTest.testOld  avgt    5  135315.458  2793.886  ns/op
   ```
   
   7% faster.


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