hduelme commented on PR #1096:
URL: https://github.com/apache/commons-lang/pull/1096#issuecomment-1678027310
@garydgregory as you surgeste, I wrote a small test.
Here the results
```
/home/hduelme/.jdks/temurin-1.8.0_362/bin/java
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8 -classpath
/home/hduelme/IdeaProjects/commons-lang/target/test-classes:/home/hduelme/IdeaProjects/commons-lang/target/classes:/home/hduelme/.m2/repository/org/junit/jupiter/junit-jupiter/5.9.3/junit-jupiter-5.9.3.jar:/home/hduelme/.m2/repository/org/junit/jupiter/junit-jupiter-api/5.9.3/junit-jupiter-api-5.9.3.jar:/home/hduelme/.m2/repository/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar:/home/hduelme/.m2/repository/org/junit/platform/junit-platform-commons/1.9.3/junit-platform-commons-1.9.3.jar:/home/hduelme/.m2/repository/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar:/home/hduelme/.m2/repository/org/junit/jupiter/junit-jupiter-params/5.9.3/junit-jupiter-params-5.9.3.jar:/home/hduelme/.m2/repository/org/juni
t/jupiter/junit-jupiter-engine/5.9.3/junit-jupiter-engine-5.9.3.jar:/home/hduelme/.m2/repository/org/junit/platform/junit-platform-engine/1.9.3/junit-platform-engine-1.9.3.jar:/home/hduelme/.m2/repository/org/junit-pioneer/junit-pioneer/1.9.1/junit-pioneer-1.9.1.jar:/home/hduelme/.m2/repository/org/junit/platform/junit-platform-launcher/1.9.3/junit-platform-launcher-1.9.3.jar:/home/hduelme/.m2/repository/org/hamcrest/hamcrest/2.2/hamcrest-2.2.jar:/home/hduelme/.m2/repository/org/easymock/easymock/5.1.0/easymock-5.1.0.jar:/home/hduelme/.m2/repository/org/objenesis/objenesis/3.3/objenesis-3.3.jar:/home/hduelme/.m2/repository/org/apache/commons/commons-text/1.10.0/commons-text-1.10.0.jar:/home/hduelme/.m2/repository/org/apache/commons/commons-lang3/3.12.0/commons-lang3-3.12.0.jar:/home/hduelme/.m2/repository/org/openjdk/jmh/jmh-core/1.37/jmh-core-1.37.jar:/home/hduelme/.m2/repository/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar:/home/hduelme/.m2/repository/org/apache/comm
ons/commons-math3/3.6.1/commons-math3-3.6.1.jar:/home/hduelme/.m2/repository/org/openjdk/jmh/jmh-generator-annprocess/1.37/jmh-generator-annprocess-1.37.jar:/home/hduelme/.m2/repository/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.jar
org.openjdk.jmh.Main org.apache.commons.lang3.StringUtilsIsMixedCaseTest.*
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.newIsMixedCaseBeginningMatch
# Run progress: 0.00% complete, ETA 01:06:40
# Fork: 1 of 5
# Warmup Iteration 1: 6.154 ns/op
# Warmup Iteration 2: 6.144 ns/op
# Warmup Iteration 3: 4.745 ns/op
# Warmup Iteration 4: 4.752 ns/op
# Warmup Iteration 5: 4.767 ns/op
Iteration 1: 4.751 ns/op
Iteration 2: 4.752 ns/op
Iteration 3: 4.761 ns/op
Iteration 4: 4.753 ns/op
Iteration 5: 4.749 ns/op
# Run progress: 2.50% complete, ETA 01:05:24
# Fork: 2 of 5
# Warmup Iteration 1: 6.260 ns/op
# Warmup Iteration 2: 6.148 ns/op
# Warmup Iteration 3: 4.458 ns/op
# Warmup Iteration 4: 4.455 ns/op
# Warmup Iteration 5: 4.456 ns/op
Iteration 1: 4.464 ns/op
Iteration 2: 4.454 ns/op
Iteration 3: 4.456 ns/op
Iteration 4: 4.458 ns/op
Iteration 5: 4.474 ns/op
# Run progress: 5.00% complete, ETA 01:03:42
# Fork: 3 of 5
# Warmup Iteration 1: 6.258 ns/op
# Warmup Iteration 2: 6.128 ns/op
# Warmup Iteration 3: 4.469 ns/op
# Warmup Iteration 4: 4.471 ns/op
# Warmup Iteration 5: 4.459 ns/op
Iteration 1: 4.473 ns/op
Iteration 2: 4.468 ns/op
Iteration 3: 4.469 ns/op
Iteration 4: 4.469 ns/op
Iteration 5: 4.455 ns/op
# Run progress: 7.50% complete, ETA 01:02:01
# Fork: 4 of 5
# Warmup Iteration 1: 7.002 ns/op
# Warmup Iteration 2: 6.128 ns/op
# Warmup Iteration 3: 4.456 ns/op
# Warmup Iteration 4: 4.477 ns/op
# Warmup Iteration 5: 4.463 ns/op
Iteration 1: 4.460 ns/op
Iteration 2: 4.461 ns/op
Iteration 3: 4.456 ns/op
Iteration 4: 4.454 ns/op
Iteration 5: 4.456 ns/op
# Run progress: 10.00% complete, ETA 01:00:20
# Fork: 5 of 5
# Warmup Iteration 1: 6.256 ns/op
# Warmup Iteration 2: 6.131 ns/op
# Warmup Iteration 3: 4.458 ns/op
# Warmup Iteration 4: 4.478 ns/op
# Warmup Iteration 5: 4.476 ns/op
Iteration 1: 4.475 ns/op
Iteration 2: 4.468 ns/op
Iteration 3: 4.463 ns/op
Iteration 4: 4.457 ns/op
Iteration 5: 4.461 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.newIsMixedCaseBeginningMatch":
4.521 ±(99.9%) 0.089 ns/op [Average]
(min, avg, max) = (4.454, 4.521, 4.761), stdev = 0.119
CI (99.9%): [4.432, 4.610] (assumes normal distribution)
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.newIsMixedCaseEndMatch
# Run progress: 12.50% complete, ETA 00:58:39
# Fork: 1 of 5
# Warmup Iteration 1: 26.808 ns/op
# Warmup Iteration 2: 19.734 ns/op
# Warmup Iteration 3: 28.725 ns/op
# Warmup Iteration 4: 28.759 ns/op
# Warmup Iteration 5: 28.709 ns/op
Iteration 1: 28.673 ns/op
Iteration 2: 28.670 ns/op
Iteration 3: 28.657 ns/op
Iteration 4: 28.672 ns/op
Iteration 5: 28.644 ns/op
# Run progress: 15.00% complete, ETA 00:56:59
# Fork: 2 of 5
# Warmup Iteration 1: 26.805 ns/op
# Warmup Iteration 2: 19.854 ns/op
# Warmup Iteration 3: 28.770 ns/op
# Warmup Iteration 4: 28.703 ns/op
# Warmup Iteration 5: 28.683 ns/op
Iteration 1: 28.687 ns/op
Iteration 2: 28.702 ns/op
Iteration 3: 28.723 ns/op
Iteration 4: 28.834 ns/op
Iteration 5: 28.735 ns/op
# Run progress: 17.50% complete, ETA 00:55:18
# Fork: 3 of 5
# Warmup Iteration 1: 27.197 ns/op
# Warmup Iteration 2: 19.838 ns/op
# Warmup Iteration 3: 28.919 ns/op
# Warmup Iteration 4: 28.917 ns/op
# Warmup Iteration 5: 28.904 ns/op
Iteration 1: 28.922 ns/op
Iteration 2: 28.924 ns/op
Iteration 3: 28.871 ns/op
Iteration 4: 28.813 ns/op
Iteration 5: 28.951 ns/op
# Run progress: 20.00% complete, ETA 00:53:38
# Fork: 4 of 5
# Warmup Iteration 1: 26.772 ns/op
# Warmup Iteration 2: 19.782 ns/op
# Warmup Iteration 3: 28.762 ns/op
# Warmup Iteration 4: 28.760 ns/op
# Warmup Iteration 5: 28.703 ns/op
Iteration 1: 28.689 ns/op
Iteration 2: 28.681 ns/op
Iteration 3: 28.698 ns/op
Iteration 4: 28.687 ns/op
Iteration 5: 28.685 ns/op
# Run progress: 22.50% complete, ETA 00:51:57
# Fork: 5 of 5
# Warmup Iteration 1: 26.797 ns/op
# Warmup Iteration 2: 19.813 ns/op
# Warmup Iteration 3: 28.716 ns/op
# Warmup Iteration 4: 28.734 ns/op
# Warmup Iteration 5: 28.884 ns/op
Iteration 1: 28.749 ns/op
Iteration 2: 28.721 ns/op
Iteration 3: 28.726 ns/op
Iteration 4: 28.842 ns/op
Iteration 5: 28.707 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.newIsMixedCaseEndMatch":
28.746 ±(99.9%) 0.069 ns/op [Average]
(min, avg, max) = (28.644, 28.746, 28.951), stdev = 0.092
CI (99.9%): [28.678, 28.815] (assumes normal distribution)
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.newIsMixedCaseMiddleMatch
# Run progress: 25.00% complete, ETA 00:50:17
# Fork: 1 of 5
# Warmup Iteration 1: 15.312 ns/op
# Warmup Iteration 2: 12.293 ns/op
# Warmup Iteration 3: 14.249 ns/op
# Warmup Iteration 4: 14.174 ns/op
# Warmup Iteration 5: 14.212 ns/op
Iteration 1: 14.195 ns/op
Iteration 2: 14.259 ns/op
Iteration 3: 14.197 ns/op
Iteration 4: 14.459 ns/op
Iteration 5: 14.409 ns/op
# Run progress: 27.50% complete, ETA 00:48:36
# Fork: 2 of 5
# Warmup Iteration 1: 15.696 ns/op
# Warmup Iteration 2: 12.001 ns/op
# Warmup Iteration 3: 14.163 ns/op
# Warmup Iteration 4: 14.155 ns/op
# Warmup Iteration 5: 14.156 ns/op
Iteration 1: 14.145 ns/op
Iteration 2: 14.101 ns/op
Iteration 3: 14.168 ns/op
Iteration 4: 14.122 ns/op
Iteration 5: 14.105 ns/op
# Run progress: 30.00% complete, ETA 00:46:55
# Fork: 3 of 5
# Warmup Iteration 1: 15.357 ns/op
# Warmup Iteration 2: 12.311 ns/op
# Warmup Iteration 3: 14.222 ns/op
# Warmup Iteration 4: 14.159 ns/op
# Warmup Iteration 5: 14.142 ns/op
Iteration 1: 14.056 ns/op
Iteration 2: 14.096 ns/op
Iteration 3: 14.050 ns/op
Iteration 4: 14.085 ns/op
Iteration 5: 14.053 ns/op
# Run progress: 32.50% complete, ETA 00:45:15
# Fork: 4 of 5
# Warmup Iteration 1: 15.104 ns/op
# Warmup Iteration 2: 12.046 ns/op
# Warmup Iteration 3: 14.087 ns/op
# Warmup Iteration 4: 14.103 ns/op
# Warmup Iteration 5: 14.057 ns/op
Iteration 1: 14.067 ns/op
Iteration 2: 14.072 ns/op
Iteration 3: 14.085 ns/op
Iteration 4: 14.101 ns/op
Iteration 5: 14.086 ns/op
# Run progress: 35.00% complete, ETA 00:43:34
# Fork: 5 of 5
# Warmup Iteration 1: 15.144 ns/op
# Warmup Iteration 2: 12.075 ns/op
# Warmup Iteration 3: 14.110 ns/op
# Warmup Iteration 4: 14.142 ns/op
# Warmup Iteration 5: 14.121 ns/op
Iteration 1: 14.117 ns/op
Iteration 2: 14.133 ns/op
Iteration 3: 14.095 ns/op
Iteration 4: 14.209 ns/op
Iteration 5: 14.118 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.newIsMixedCaseMiddleMatch":
14.143 ±(99.9%) 0.077 ns/op [Average]
(min, avg, max) = (14.050, 14.143, 14.459), stdev = 0.102
CI (99.9%): [14.067, 14.220] (assumes normal distribution)
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.newIsMixedCaseNoneMatch
# Run progress: 37.50% complete, ETA 00:41:54
# Fork: 1 of 5
# Warmup Iteration 1: 70.563 ns/op
# Warmup Iteration 2: 70.388 ns/op
# Warmup Iteration 3: 50.391 ns/op
# Warmup Iteration 4: 50.451 ns/op
# Warmup Iteration 5: 50.437 ns/op
Iteration 1: 50.482 ns/op
Iteration 2: 50.394 ns/op
Iteration 3: 50.395 ns/op
Iteration 4: 50.375 ns/op
Iteration 5: 50.407 ns/op
# Run progress: 40.00% complete, ETA 00:40:13
# Fork: 2 of 5
# Warmup Iteration 1: 70.549 ns/op
# Warmup Iteration 2: 70.368 ns/op
# Warmup Iteration 3: 51.116 ns/op
# Warmup Iteration 4: 51.021 ns/op
# Warmup Iteration 5: 51.174 ns/op
Iteration 1: 51.157 ns/op
Iteration 2: 50.922 ns/op
Iteration 3: 51.075 ns/op
Iteration 4: 51.081 ns/op
Iteration 5: 51.198 ns/op
# Run progress: 42.50% complete, ETA 00:38:32
# Fork: 3 of 5
# Warmup Iteration 1: 70.523 ns/op
# Warmup Iteration 2: 70.378 ns/op
# Warmup Iteration 3: 50.503 ns/op
# Warmup Iteration 4: 50.411 ns/op
# Warmup Iteration 5: 50.407 ns/op
Iteration 1: 50.401 ns/op
Iteration 2: 50.702 ns/op
Iteration 3: 50.447 ns/op
Iteration 4: 50.392 ns/op
Iteration 5: 50.381 ns/op
# Run progress: 45.00% complete, ETA 00:36:52
# Fork: 4 of 5
# Warmup Iteration 1: 70.680 ns/op
# Warmup Iteration 2: 70.607 ns/op
# Warmup Iteration 3: 50.591 ns/op
# Warmup Iteration 4: 50.451 ns/op
# Warmup Iteration 5: 50.573 ns/op
Iteration 1: 51.319 ns/op
Iteration 2: 50.672 ns/op
Iteration 3: 50.496 ns/op
Iteration 4: 50.551 ns/op
Iteration 5: 50.576 ns/op
# Run progress: 47.50% complete, ETA 00:35:11
# Fork: 5 of 5
# Warmup Iteration 1: 70.528 ns/op
# Warmup Iteration 2: 70.427 ns/op
# Warmup Iteration 3: 50.416 ns/op
# Warmup Iteration 4: 50.365 ns/op
# Warmup Iteration 5: 50.360 ns/op
Iteration 1: 50.420 ns/op
Iteration 2: 50.424 ns/op
Iteration 3: 50.368 ns/op
Iteration 4: 50.442 ns/op
Iteration 5: 50.362 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.newIsMixedCaseNoneMatch":
50.617 ±(99.9%) 0.232 ns/op [Average]
(min, avg, max) = (50.362, 50.617, 51.319), stdev = 0.310
CI (99.9%): [50.385, 50.850] (assumes normal distribution)
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.oldIsMixedCaseBeginningMatch
# Run progress: 50.00% complete, ETA 00:33:31
# Fork: 1 of 5
# Warmup Iteration 1: 9.442 ns/op
# Warmup Iteration 2: 7.279 ns/op
# Warmup Iteration 3: 5.311 ns/op
# Warmup Iteration 4: 5.312 ns/op
# Warmup Iteration 5: 5.317 ns/op
Iteration 1: 5.312 ns/op
Iteration 2: 5.310 ns/op
Iteration 3: 5.305 ns/op
Iteration 4: 5.296 ns/op
Iteration 5: 5.301 ns/op
# Run progress: 52.50% complete, ETA 00:31:50
# Fork: 2 of 5
# Warmup Iteration 1: 8.650 ns/op
# Warmup Iteration 2: 7.253 ns/op
# Warmup Iteration 3: 5.309 ns/op
# Warmup Iteration 4: 5.292 ns/op
# Warmup Iteration 5: 5.300 ns/op
Iteration 1: 5.311 ns/op
Iteration 2: 5.301 ns/op
Iteration 3: 5.322 ns/op
Iteration 4: 5.309 ns/op
Iteration 5: 5.348 ns/op
# Run progress: 55.00% complete, ETA 00:30:10
# Fork: 3 of 5
# Warmup Iteration 1: 9.520 ns/op
# Warmup Iteration 2: 7.302 ns/op
# Warmup Iteration 3: 5.305 ns/op
# Warmup Iteration 4: 5.413 ns/op
# Warmup Iteration 5: 5.289 ns/op
Iteration 1: 5.290 ns/op
Iteration 2: 5.302 ns/op
Iteration 3: 5.292 ns/op
Iteration 4: 5.291 ns/op
Iteration 5: 5.300 ns/op
# Run progress: 57.50% complete, ETA 00:28:29
# Fork: 4 of 5
# Warmup Iteration 1: 8.836 ns/op
# Warmup Iteration 2: 7.252 ns/op
# Warmup Iteration 3: 5.303 ns/op
# Warmup Iteration 4: 5.309 ns/op
# Warmup Iteration 5: 5.302 ns/op
Iteration 1: 5.292 ns/op
Iteration 2: 5.331 ns/op
Iteration 3: 5.357 ns/op
Iteration 4: 5.406 ns/op
Iteration 5: 5.340 ns/op
# Run progress: 60.00% complete, ETA 00:26:48
# Fork: 5 of 5
# Warmup Iteration 1: 7.761 ns/op
# Warmup Iteration 2: 8.117 ns/op
# Warmup Iteration 3: 7.011 ns/op
# Warmup Iteration 4: 7.120 ns/op
# Warmup Iteration 5: 7.040 ns/op
Iteration 1: 6.999 ns/op
Iteration 2: 7.015 ns/op
Iteration 3: 7.024 ns/op
Iteration 4: 7.020 ns/op
Iteration 5: 7.011 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.oldIsMixedCaseBeginningMatch":
5.655 ±(99.9%) 0.520 ns/op [Average]
(min, avg, max) = (5.290, 5.655, 7.024), stdev = 0.694
CI (99.9%): [5.136, 6.175] (assumes normal distribution)
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.oldIsMixedCaseEndMatch
# Run progress: 62.50% complete, ETA 00:25:08
# Fork: 1 of 5
# Warmup Iteration 1: 42.271 ns/op
# Warmup Iteration 2: 43.333 ns/op
# Warmup Iteration 3: 33.665 ns/op
# Warmup Iteration 4: 33.696 ns/op
# Warmup Iteration 5: 33.678 ns/op
Iteration 1: 33.692 ns/op
Iteration 2: 33.685 ns/op
Iteration 3: 33.666 ns/op
Iteration 4: 33.659 ns/op
Iteration 5: 33.662 ns/op
# Run progress: 65.00% complete, ETA 00:23:27
# Fork: 2 of 5
# Warmup Iteration 1: 36.642 ns/op
# Warmup Iteration 2: 42.727 ns/op
# Warmup Iteration 3: 37.103 ns/op
# Warmup Iteration 4: 37.105 ns/op
# Warmup Iteration 5: 37.084 ns/op
Iteration 1: 37.107 ns/op
Iteration 2: 37.058 ns/op
Iteration 3: 37.022 ns/op
Iteration 4: 37.045 ns/op
Iteration 5: 37.110 ns/op
# Run progress: 67.50% complete, ETA 00:21:47
# Fork: 3 of 5
# Warmup Iteration 1: 36.601 ns/op
# Warmup Iteration 2: 42.661 ns/op
# Warmup Iteration 3: 36.406 ns/op
# Warmup Iteration 4: 36.379 ns/op
# Warmup Iteration 5: 36.441 ns/op
Iteration 1: 36.440 ns/op
Iteration 2: 36.617 ns/op
Iteration 3: 36.487 ns/op
Iteration 4: 36.597 ns/op
Iteration 5: 36.476 ns/op
# Run progress: 70.00% complete, ETA 00:20:06
# Fork: 4 of 5
# Warmup Iteration 1: 36.565 ns/op
# Warmup Iteration 2: 42.933 ns/op
# Warmup Iteration 3: 36.266 ns/op
# Warmup Iteration 4: 36.434 ns/op
# Warmup Iteration 5: 36.407 ns/op
Iteration 1: 36.436 ns/op
Iteration 2: 36.214 ns/op
Iteration 3: 36.289 ns/op
Iteration 4: 36.400 ns/op
Iteration 5: 36.430 ns/op
# Run progress: 72.50% complete, ETA 00:18:26
# Fork: 5 of 5
# Warmup Iteration 1: 36.686 ns/op
# Warmup Iteration 2: 43.143 ns/op
# Warmup Iteration 3: 36.252 ns/op
# Warmup Iteration 4: 36.161 ns/op
# Warmup Iteration 5: 36.312 ns/op
Iteration 1: 36.316 ns/op
Iteration 2: 36.177 ns/op
Iteration 3: 36.214 ns/op
Iteration 4: 36.308 ns/op
Iteration 5: 36.237 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.oldIsMixedCaseEndMatch":
35.974 ±(99.9%) 0.907 ns/op [Average]
(min, avg, max) = (33.659, 35.974, 37.110), stdev = 1.210
CI (99.9%): [35.067, 36.880] (assumes normal distribution)
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.oldIsMixedCaseMiddleMatch
# Run progress: 75.00% complete, ETA 00:16:45
# Fork: 1 of 5
# Warmup Iteration 1: 19.964 ns/op
# Warmup Iteration 2: 20.020 ns/op
# Warmup Iteration 3: 15.399 ns/op
# Warmup Iteration 4: 15.371 ns/op
# Warmup Iteration 5: 15.392 ns/op
Iteration 1: 15.440 ns/op
Iteration 2: 15.400 ns/op
Iteration 3: 15.365 ns/op
Iteration 4: 15.384 ns/op
Iteration 5: 15.373 ns/op
# Run progress: 77.50% complete, ETA 00:15:05
# Fork: 2 of 5
# Warmup Iteration 1: 16.515 ns/op
# Warmup Iteration 2: 20.036 ns/op
# Warmup Iteration 3: 15.277 ns/op
# Warmup Iteration 4: 15.237 ns/op
# Warmup Iteration 5: 15.185 ns/op
Iteration 1: 15.132 ns/op
Iteration 2: 15.176 ns/op
Iteration 3: 15.198 ns/op
Iteration 4: 15.204 ns/op
Iteration 5: 15.230 ns/op
# Run progress: 80.00% complete, ETA 00:13:24
# Fork: 3 of 5
# Warmup Iteration 1: 19.751 ns/op
# Warmup Iteration 2: 20.010 ns/op
# Warmup Iteration 3: 15.241 ns/op
# Warmup Iteration 4: 15.460 ns/op
# Warmup Iteration 5: 15.286 ns/op
Iteration 1: 15.191 ns/op
Iteration 2: 15.282 ns/op
Iteration 3: 15.206 ns/op
Iteration 4: 15.189 ns/op
Iteration 5: 15.187 ns/op
# Run progress: 82.50% complete, ETA 00:11:43
# Fork: 4 of 5
# Warmup Iteration 1: 19.742 ns/op
# Warmup Iteration 2: 20.189 ns/op
# Warmup Iteration 3: 15.367 ns/op
# Warmup Iteration 4: 15.434 ns/op
# Warmup Iteration 5: 15.451 ns/op
Iteration 1: 15.397 ns/op
Iteration 2: 15.307 ns/op
Iteration 3: 15.375 ns/op
Iteration 4: 15.314 ns/op
Iteration 5: 15.310 ns/op
# Run progress: 85.00% complete, ETA 00:10:03
# Fork: 5 of 5
# Warmup Iteration 1: 20.045 ns/op
# Warmup Iteration 2: 20.070 ns/op
# Warmup Iteration 3: 15.327 ns/op
# Warmup Iteration 4: 15.315 ns/op
# Warmup Iteration 5: 15.340 ns/op
Iteration 1: 15.222 ns/op
Iteration 2: 15.209 ns/op
Iteration 3: 15.173 ns/op
Iteration 4: 15.244 ns/op
Iteration 5: 15.249 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.oldIsMixedCaseMiddleMatch":
15.270 ±(99.9%) 0.067 ns/op [Average]
(min, avg, max) = (15.132, 15.270, 15.440), stdev = 0.089
CI (99.9%): [15.204, 15.337] (assumes normal distribution)
# JMH version: 1.37
# VM version: JDK 1.8.0_362, OpenJDK 64-Bit Server VM, 25.362-b09
# VM invoker: /home/hduelme/.jdks/temurin-1.8.0_362/jre/bin/java
# VM options:
-javaagent:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/lib/idea_rt.jar=38469:/home/hduelme/.local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/bin
-Dfile.encoding=UTF-8
# Blackhole mode: full + dont-inline hint (auto-detected, use
-Djmh.blackhole.autoDetect=false to disable)
# 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.StringUtilsIsMixedCaseTest.oldIsMixedCaseNoneMatch
# Run progress: 87.50% complete, ETA 00:08:22
# Fork: 1 of 5
# Warmup Iteration 1: 73.396 ns/op
# Warmup Iteration 2: 73.192 ns/op
# Warmup Iteration 3: 73.192 ns/op
# Warmup Iteration 4: 73.222 ns/op
# Warmup Iteration 5: 73.186 ns/op
Iteration 1: 73.298 ns/op
Iteration 2: 73.185 ns/op
Iteration 3: 73.204 ns/op
Iteration 4: 73.200 ns/op
Iteration 5: 73.202 ns/op
# Run progress: 90.00% complete, ETA 00:06:42
# Fork: 2 of 5
# Warmup Iteration 1: 73.385 ns/op
# Warmup Iteration 2: 80.468 ns/op
# Warmup Iteration 3: 73.504 ns/op
# Warmup Iteration 4: 73.408 ns/op
# Warmup Iteration 5: 73.587 ns/op
Iteration 1: 73.543 ns/op
Iteration 2: 73.358 ns/op
Iteration 3: 73.584 ns/op
Iteration 4: 73.447 ns/op
Iteration 5: 73.605 ns/op
# Run progress: 92.50% complete, ETA 00:05:01
# Fork: 3 of 5
# Warmup Iteration 1: 73.718 ns/op
# Warmup Iteration 2: 73.194 ns/op
# Warmup Iteration 3: 73.207 ns/op
# Warmup Iteration 4: 73.200 ns/op
# Warmup Iteration 5: 73.188 ns/op
Iteration 1: 73.222 ns/op
Iteration 2: 73.218 ns/op
Iteration 3: 73.440 ns/op
Iteration 4: 73.442 ns/op
Iteration 5: 73.430 ns/op
# Run progress: 95.00% complete, ETA 00:03:21
# Fork: 4 of 5
# Warmup Iteration 1: 73.404 ns/op
# Warmup Iteration 2: 73.236 ns/op
# Warmup Iteration 3: 73.223 ns/op
# Warmup Iteration 4: 73.221 ns/op
# Warmup Iteration 5: 73.457 ns/op
Iteration 1: 73.476 ns/op
Iteration 2: 73.180 ns/op
Iteration 3: 73.283 ns/op
Iteration 4: 73.259 ns/op
Iteration 5: 73.434 ns/op
# Run progress: 97.50% complete, ETA 00:01:40
# Fork: 5 of 5
# Warmup Iteration 1: 73.345 ns/op
# Warmup Iteration 2: 73.432 ns/op
# Warmup Iteration 3: 73.227 ns/op
# Warmup Iteration 4: 73.269 ns/op
# Warmup Iteration 5: 73.246 ns/op
Iteration 1: 73.227 ns/op
Iteration 2: 73.204 ns/op
Iteration 3: 73.227 ns/op
Iteration 4: 73.360 ns/op
Iteration 5: 73.240 ns/op
Result
"org.apache.commons.lang3.StringUtilsIsMixedCaseTest.oldIsMixedCaseNoneMatch":
73.331 ±(99.9%) 0.101 ns/op [Average]
(min, avg, max) = (73.180, 73.331, 73.605), stdev = 0.135
CI (99.9%): [73.230, 73.432] (assumes normal distribution)
# Run complete. Total time: 01:07:02
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
StringUtilsIsMixedCaseTest.newIsMixedCaseBeginningMatch avgt 25 4.521 ±
0.089 ns/op
StringUtilsIsMixedCaseTest.newIsMixedCaseEndMatch avgt 25 28.746 ±
0.069 ns/op
StringUtilsIsMixedCaseTest.newIsMixedCaseMiddleMatch avgt 25 14.143 ±
0.077 ns/op
StringUtilsIsMixedCaseTest.newIsMixedCaseNoneMatch avgt 25 50.617 ±
0.232 ns/op
StringUtilsIsMixedCaseTest.oldIsMixedCaseBeginningMatch avgt 25 5.655 ±
0.520 ns/op
StringUtilsIsMixedCaseTest.oldIsMixedCaseEndMatch avgt 25 35.974 ±
0.907 ns/op
StringUtilsIsMixedCaseTest.oldIsMixedCaseMiddleMatch avgt 25 15.270 ±
0.067 ns/op
StringUtilsIsMixedCaseTest.oldIsMixedCaseNoneMatch avgt 25 73.331 ±
0.101 ns/op
Process finished with exit code 0
```
As you could see, in every senorio I tested the code is between 1ns and 25ns
per op faster.
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