[LANG-1548] split regionMatches for better performance by XenoAmess · Pull Request #534 · apache/commons-lang

XenoAmess · 2020-05-31T07:25:44Z

No description provided.

coveralls · 2020-05-31T21:15:11Z

Coverage increased (+0.005%) to 94.962% when pulling d9be6a3 on xenoamess-fork:split_regionMatches_for_better_performance into e233ab6 on apache:master.

XenoAmess · 2020-05-31T22:26:29Z

also want to split StringUtils.startswith, endwith, prependIfMissing...
now the call flow is like this:

user call startsWith(final CharSequence str, final CharSequence prefix)
give an additional boolean, and invoke startsWith(final CharSequence str, final CharSequence prefix, final boolean ignoreCase)
invoke CharSequenceUtils.regionMatches(str, ignoreCase, 0, prefix, 0, prefix.length());
in CharSequenceUtils.regionMatches(str, ignoreCase, 0, prefix, 0, prefix.length()) we detect that boolean.

That is, actually weird, as when we call startsWith(final CharSequence str, final CharSequence prefix) we know the boolean is false, and we still fill a false boolean and let it detect at runtime.
But, detecting a boolean is not a big performance issue (if not in a loop and perform tons of times)
So I leave it unchanged for next pr.
We can discuss whether should split regionMatches first.

XenoAmess · 2020-06-01T16:15:24Z

Hi.
According to 72 Hour Lazy Consensus rule, if nobody against this pr, I will continue developing codes about this pr in 50 hours later, means spliting more functions in StringUtils including startsWith, endsWith and so on.

XenoAmess · 2020-06-02T02:46:07Z

@garydgregory

Conclusion:
after doing the splition, it can speed up around 25%.

[INFO] --- exec-maven-plugin:1.6.0:exec (benchmark) @ commons-lang3 ---
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.openjdk.jmh.util.Utils (file:/C:/Users/xenoa/.m2/repository/org/openjdk
/jmh/jmh-core/1.21/jmh-core-1.21.jar) to field java.io.PrintStream.charOut
WARNING: Please consider reporting this to the maintainers of org.openjdk.jmh.util.Utils
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.testNew

# Run progress: 0.00% complete, ETA 00:50:00
# Fork: 1 of 5
# Warmup Iteration   1: 1676780966.667 ns/op
# Warmup Iteration   2: 1771491016.667 ns/op
# Warmup Iteration   3: 1581506185.714 ns/op
# Warmup Iteration   4: 2056147750.000 ns/op
# Warmup Iteration   5: 1432607457.143 ns/op
Iteration   1: 1810178866.667 ns/op
Iteration   2: 1446362657.143 ns/op
Iteration   3: 1748144866.667 ns/op
Iteration   4: 1605476071.429 ns/op
Iteration   5: 1794209950.000 ns/op

# Run progress: 3.33% complete, ETA 00:52:22
# Fork: 2 of 5
# Warmup Iteration   1: 1511623771.429 ns/op
# Warmup Iteration   2: 1495295371.429 ns/op
# Warmup Iteration   3: 1495742928.571 ns/op
# Warmup Iteration   4: 1722803700.000 ns/op
# Warmup Iteration   5: 1482953414.286 ns/op
Iteration   1: 1745675116.667 ns/op
Iteration   2: 1611334828.571 ns/op
Iteration   3: 1673340485.714 ns/op
Iteration   4: 1357552837.500 ns/op
Iteration   5: 1564756800.000 ns/op

# Run progress: 6.67% complete, ETA 00:50:36
# Fork: 3 of 5
# Warmup Iteration   1: 1717714433.333 ns/op
# Warmup Iteration   2: 1775668516.667 ns/op
# Warmup Iteration   3: 1762111866.667 ns/op
# Warmup Iteration   4: 2135332980.000 ns/op
# Warmup Iteration   5: 1715229116.667 ns/op
Iteration   1: 1966963233.333 ns/op
Iteration   2: 2031982040.000 ns/op
Iteration   3: 1813285066.667 ns/op
Iteration   4: 1934091583.333 ns/op
Iteration   5: 1990891316.667 ns/op

# Run progress: 10.00% complete, ETA 00:49:03
# Fork: 4 of 5
# Warmup Iteration   1: 1637729900.000 ns/op
# Warmup Iteration   2: 2080932760.000 ns/op
# Warmup Iteration   3: 1770361200.000 ns/op
# Warmup Iteration   4: 1370627400.000 ns/op
# Warmup Iteration   5: 1629913900.000 ns/op
Iteration   1: 2002821900.000 ns/op
Iteration   2: 1841407766.667 ns/op
Iteration   3: 1609561685.714 ns/op
Iteration   4: 1557553557.143 ns/op
Iteration   5: 1677166966.667 ns/op

# Run progress: 13.33% complete, ETA 00:47:13
# Fork: 5 of 5
# Warmup Iteration   1: 1319836937.500 ns/op
# Warmup Iteration   2: 1540287771.429 ns/op
# Warmup Iteration   3: 1593160257.143 ns/op
# Warmup Iteration   4: 1546483685.714 ns/op
# Warmup Iteration   5: 1543815542.857 ns/op
Iteration   1: 1682335566.667 ns/op
Iteration   2: 1566039728.571 ns/op
Iteration   3: 1694355566.667 ns/op
Iteration   4: 1599394871.429 ns/op
Iteration   5: 1757485850.000 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.testNew":
  1723294767.195 ?99.9%) 131123557.188 ns/op [Average]

  (min, avg, max) = (1357552837.500, 1723294767.195, 2031982040.000), stdev = 175046197.369
  CI (99.9%): [1592171210.007, 1854418324.383] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.testOld

# Run progress: 16.67% complete, ETA 00:45:19
# Fork: 1 of 5
# Warmup Iteration   1: 1830971983.333 ns/op
# Warmup Iteration   2: 2188674760.000 ns/op
# Warmup Iteration   3: 2181211500.000 ns/op
# Warmup Iteration   4: 2349953100.000 ns/op
# Warmup Iteration   5: 2360081080.000 ns/op
Iteration   1: 2212511940.000 ns/op
Iteration   2: 2384214220.000 ns/op
Iteration   3: 2227561540.000 ns/op
Iteration   4: 2312551740.000 ns/op
Iteration   5: 2426368360.000 ns/op

# Run progress: 20.00% complete, ETA 00:43:56
# Fork: 2 of 5
# Warmup Iteration   1: 2717844250.000 ns/op
# Warmup Iteration   2: 2585462975.000 ns/op
# Warmup Iteration   3: 2473264440.000 ns/op
# Warmup Iteration   4: 2270443600.000 ns/op
# Warmup Iteration   5: 1808085450.000 ns/op
Iteration   1: 2028658920.000 ns/op
Iteration   2: 2032796820.000 ns/op
Iteration   3: 2038743100.000 ns/op
Iteration   4: 2217756360.000 ns/op
Iteration   5: 2352394580.000 ns/op

# Run progress: 23.33% complete, ETA 00:42:08
# Fork: 3 of 5
# Warmup Iteration   1: 2084758120.000 ns/op
# Warmup Iteration   2: 1932792450.000 ns/op
# Warmup Iteration   3: 2002423360.000 ns/op
# Warmup Iteration   4: 2377394140.000 ns/op
# Warmup Iteration   5: 2107299380.000 ns/op
Iteration   1: 2456784940.000 ns/op
Iteration   2: 2353495040.000 ns/op
Iteration   3: 2355378120.000 ns/op
Iteration   4: 2271070960.000 ns/op
Iteration   5: 1892835216.667 ns/op

# Run progress: 26.67% complete, ETA 00:40:29
# Fork: 4 of 5
# Warmup Iteration   1: 1807640716.667 ns/op
# Warmup Iteration   2: 2016794460.000 ns/op
# Warmup Iteration   3: 2198285300.000 ns/op
# Warmup Iteration   4: 2100802840.000 ns/op
# Warmup Iteration   5: 2311592060.000 ns/op
Iteration   1: 2380056300.000 ns/op
Iteration   2: 2138964640.000 ns/op
Iteration   3: 2291114240.000 ns/op
Iteration   4: 2349544800.000 ns/op
Iteration   5: 2390796680.000 ns/op

# Run progress: 30.00% complete, ETA 00:38:44
# Fork: 5 of 5
# Warmup Iteration   1: 2325848660.000 ns/op
# Warmup Iteration   2: 2471929880.000 ns/op
# Warmup Iteration   3: 2182010260.000 ns/op
# Warmup Iteration   4: 1941523050.000 ns/op
# Warmup Iteration   5: 2275766680.000 ns/op
Iteration   1: 2225102700.000 ns/op
Iteration   2: 2390513420.000 ns/op
Iteration   3: 2354390080.000 ns/op
Iteration   4: 2202851920.000 ns/op
Iteration   5: 2233467340.000 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.testOld":
  2260796959.067 ?99.9%) 107182112.664 ns/op [Average]

  (min, avg, max) = (1892835216.667, 2260796959.067, 2456784940.000), stdev = 143085053.900
  CI (99.9%): [2153614846.403, 2367979071.730] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe

XenoAmess · 2020-06-05T14:40:21Z

I refined the test source, and give it a retest.
result:

[INFO] --- exec-maven-plugin:1.6.0:exec (benchmark) @ commons-lang3 ---
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.openjdk.jmh.util.Utils (file:/C:/Users/xenoa/.m2/repository/org/openjd
k/jmh/jmh-core/1.21/jmh-core-1.21.jar) to field java.io.PrintStream.charOut
WARNING: Please consider reporting this to the maintainers of org.openjdk.jmh.util.Utils
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test0New

# Run progress: 0.00% complete, ETA 01:15:00
# Fork: 1 of 5
# Warmup Iteration   1: 2891811.998 ns/op
# Warmup Iteration   2: 2416673.665 ns/op
# Warmup Iteration   3: 2446011.030 ns/op
# Warmup Iteration   4: 2449321.915 ns/op
# Warmup Iteration   5: 2447740.822 ns/op
Iteration   1: 2461469.062 ns/op
Iteration   2: 2442310.061 ns/op
Iteration   3: 2427010.386 ns/op
Iteration   4: 2421185.766 ns/op
Iteration   5: 2419471.335 ns/op

# Run progress: 2.22% complete, ETA 01:13:53
# Fork: 2 of 5
# Warmup Iteration   1: 2273738.841 ns/op
# Warmup Iteration   2: 2401915.102 ns/op
# Warmup Iteration   3: 2480256.930 ns/op
# Warmup Iteration   4: 2456014.980 ns/op
# Warmup Iteration   5: 2500686.453 ns/op
Iteration   1: 2451503.358 ns/op
Iteration   2: 2598355.209 ns/op
Iteration   3: 2466372.503 ns/op
Iteration   4: 2653839.453 ns/op
Iteration   5: 2618707.408 ns/op

# Run progress: 4.44% complete, ETA 01:12:09
# Fork: 3 of 5
# Warmup Iteration   1: 2280302.941 ns/op
# Warmup Iteration   2: 2384730.465 ns/op
# Warmup Iteration   3: 2482601.067 ns/op
# Warmup Iteration   4: 2622762.795 ns/op
# Warmup Iteration   5: 2478504.832 ns/op
Iteration   1: 2476611.191 ns/op
Iteration   2: 2419733.680 ns/op
Iteration   3: 2508645.071 ns/op
Iteration   4: 2410321.065 ns/op
Iteration   5: 2649508.079 ns/op

# Run progress: 6.67% complete, ETA 01:10:25
# Fork: 4 of 5
# Warmup Iteration   1: 2305637.137 ns/op
# Warmup Iteration   2: 2450478.780 ns/op
# Warmup Iteration   3: 2397859.012 ns/op
# Warmup Iteration   4: 2389567.344 ns/op
# Warmup Iteration   5: 2431105.348 ns/op
Iteration   1: 2305189.675 ns/op
Iteration   2: 2347030.760 ns/op
Iteration   3: 2299801.793 ns/op
Iteration   4: 2322225.215 ns/op
Iteration   5: 2303393.023 ns/op

# Run progress: 8.89% complete, ETA 01:08:45
# Fork: 5 of 5
# Warmup Iteration   1: 2160220.039 ns/op
# Warmup Iteration   2: 2265527.588 ns/op
# Warmup Iteration   3: 2314211.754 ns/op
# Warmup Iteration   4: 2296356.211 ns/op
# Warmup Iteration   5: 2309983.141 ns/op
Iteration   1: 2320520.784 ns/op
Iteration   2: 2630687.164 ns/op
Iteration   3: 2464871.970 ns/op
Iteration   4: 2541760.457 ns/op
Iteration   5: 2415263.149 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test0New":
  2455031.505 ?99.9%) 82596.431 ns/op [Average]

  (min, avg, max) = (2299801.793, 2455031.505, 2653839.453), stdev = 110263.873
  CI (99.9%): [2372435.074, 2537627.936] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test0NewInline

# Run progress: 11.11% complete, ETA 01:07:03
# Fork: 1 of 5
# Warmup Iteration   1: 2033885.418 ns/op
# Warmup Iteration   2: 2050448.032 ns/op
# Warmup Iteration   3: 2112706.717 ns/op
# Warmup Iteration   4: 2028930.365 ns/op
# Warmup Iteration   5: 2097623.653 ns/op
Iteration   1: 2297479.215 ns/op
Iteration   2: 2144106.194 ns/op
Iteration   3: 2131691.624 ns/op
Iteration   4: 2154484.859 ns/op
Iteration   5: 2087501.336 ns/op

# Run progress: 13.33% complete, ETA 01:05:22
# Fork: 2 of 5
# Warmup Iteration   1: 2053510.450 ns/op
# Warmup Iteration   2: 2051584.943 ns/op
# Warmup Iteration   3: 2043047.845 ns/op
# Warmup Iteration   4: 2066176.426 ns/op
# Warmup Iteration   5: 2048739.033 ns/op
Iteration   1: 2407814.588 ns/op
Iteration   2: 2256505.054 ns/op
Iteration   3: 2270761.430 ns/op
Iteration   4: 2174536.739 ns/op
Iteration   5: 2127787.513 ns/op

# Run progress: 15.56% complete, ETA 01:03:41
# Fork: 3 of 5
# Warmup Iteration   1: 2180176.482 ns/op
# Warmup Iteration   2: 2102209.395 ns/op
# Warmup Iteration   3: 2190961.687 ns/op
# Warmup Iteration   4: 2165113.185 ns/op
# Warmup Iteration   5: 2287634.927 ns/op
Iteration   1: 2268659.469 ns/op
Iteration   2: 2254443.913 ns/op
Iteration   3: 2252960.892 ns/op
Iteration   4: 2146608.049 ns/op
Iteration   5: 2229433.987 ns/op

# Run progress: 17.78% complete, ETA 01:02:00
# Fork: 4 of 5
# Warmup Iteration   1: 2126465.030 ns/op
# Warmup Iteration   2: 2141745.846 ns/op
# Warmup Iteration   3: 2134863.287 ns/op
# Warmup Iteration   4: 2140523.860 ns/op
# Warmup Iteration   5: 2189996.606 ns/op
Iteration   1: 2173373.968 ns/op
Iteration   2: 2195027.744 ns/op
Iteration   3: 2163932.064 ns/op
Iteration   4: 2180778.613 ns/op
Iteration   5: 2128450.277 ns/op

# Run progress: 20.00% complete, ETA 01:00:20
# Fork: 5 of 5
# Warmup Iteration   1: 2140320.223 ns/op
# Warmup Iteration   2: 2177012.797 ns/op
# Warmup Iteration   3: 2162345.903 ns/op
# Warmup Iteration   4: 2129249.702 ns/op
# Warmup Iteration   5: 2147906.635 ns/op
Iteration   1: 2155641.186 ns/op
Iteration   2: 2220715.786 ns/op
Iteration   3: 2168189.142 ns/op
Iteration   4: 2249981.152 ns/op
Iteration   5: 2411927.989 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test0NewInline":
  2210111.711 ?99.9%) 61020.046 ns/op [Average]

  (min, avg, max) = (2087501.336, 2210111.711, 2411927.989), stdev = 81460.016
  CI (99.9%): [2149091.665, 2271131.757] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test0Old

# Run progress: 22.22% complete, ETA 00:58:39
# Fork: 1 of 5
# Warmup Iteration   1: 2296448.118 ns/op
# Warmup Iteration   2: 2463329.205 ns/op
# Warmup Iteration   3: 2479069.616 ns/op
# Warmup Iteration   4: 2406087.515 ns/op
# Warmup Iteration   5: 2490171.297 ns/op
Iteration   1: 2781533.482 ns/op
Iteration   2: 2515891.925 ns/op
Iteration   3: 2708546.548 ns/op
Iteration   4: 2593129.997 ns/op
Iteration   5: 2536440.908 ns/op

# Run progress: 24.44% complete, ETA 00:56:59
# Fork: 2 of 5
# Warmup Iteration   1: 2286218.342 ns/op
# Warmup Iteration   2: 2390788.193 ns/op
# Warmup Iteration   3: 2357787.674 ns/op
# Warmup Iteration   4: 2598509.587 ns/op
# Warmup Iteration   5: 2444490.320 ns/op
Iteration   1: 2435692.913 ns/op
Iteration   2: 2521154.032 ns/op
Iteration   3: 2576613.550 ns/op
Iteration   4: 2853638.773 ns/op
Iteration   5: 2995338.593 ns/op

# Run progress: 26.67% complete, ETA 00:55:18
# Fork: 3 of 5
# Warmup Iteration   1: 2341058.825 ns/op
# Warmup Iteration   2: 2487933.731 ns/op
# Warmup Iteration   3: 2679692.242 ns/op
# Warmup Iteration   4: 2699643.482 ns/op
# Warmup Iteration   5: 2659751.862 ns/op
Iteration   1: 2687993.362 ns/op
Iteration   2: 2636774.400 ns/op
Iteration   3: 2612644.514 ns/op
Iteration   4: 2619855.867 ns/op
Iteration   5: 2952721.888 ns/op

# Run progress: 28.89% complete, ETA 00:53:39
# Fork: 4 of 5
# Warmup Iteration   1: 2314151.273 ns/op
# Warmup Iteration   2: 2311217.865 ns/op
# Warmup Iteration   3: 2520279.768 ns/op
# Warmup Iteration   4: 2747563.187 ns/op
# Warmup Iteration   5: 2833241.234 ns/op
Iteration   1: 2774529.016 ns/op
Iteration   2: 2701584.657 ns/op
Iteration   3: 2613871.309 ns/op
Iteration   4: 2692790.072 ns/op
Iteration   5: 2606149.244 ns/op

# Run progress: 31.11% complete, ETA 00:51:58
# Fork: 5 of 5
# Warmup Iteration   1: 2450734.354 ns/op
# Warmup Iteration   2: 2436959.844 ns/op
# Warmup Iteration   3: 2570785.377 ns/op
# Warmup Iteration   4: 2632124.184 ns/op
# Warmup Iteration   5: 2421804.794 ns/op
Iteration   1: 2460663.395 ns/op
Iteration   2: 2603987.279 ns/op
Iteration   3: 2840139.466 ns/op
Iteration   4: 2630008.651 ns/op
Iteration   5: 2957191.143 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test0Old":
  2676355.399 ?99.9%) 113788.180 ns/op [Average]

  (min, avg, max) = (2435692.913, 2676355.399, 2995338.593), stdev = 151903.965
  CI (99.9%): [2562567.219, 2790143.580] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test1New

# Run progress: 33.33% complete, ETA 00:50:17
# Fork: 1 of 5
# Warmup Iteration   1: 2426667.758 ns/op
# Warmup Iteration   2: 2580098.918 ns/op
# Warmup Iteration   3: 2571482.129 ns/op
# Warmup Iteration   4: 2529823.407 ns/op
# Warmup Iteration   5: 2320318.028 ns/op
Iteration   1: 2054070.883 ns/op
Iteration   2: 2040438.066 ns/op
Iteration   3: 2069738.154 ns/op
Iteration   4: 2103957.068 ns/op
Iteration   5: 2182479.598 ns/op

# Run progress: 35.56% complete, ETA 00:48:37
# Fork: 2 of 5
# Warmup Iteration   1: 2174835.921 ns/op
# Warmup Iteration   2: 2218534.206 ns/op
# Warmup Iteration   3: 2086122.424 ns/op
# Warmup Iteration   4: 2070019.975 ns/op
# Warmup Iteration   5: 2046579.153 ns/op
Iteration   1: 2051590.546 ns/op
Iteration   2: 2069987.500 ns/op
Iteration   3: 2150056.191 ns/op
Iteration   4: 2330735.260 ns/op
Iteration   5: 2466840.838 ns/op

# Run progress: 37.78% complete, ETA 00:46:56
# Fork: 3 of 5
# Warmup Iteration   1: 2352806.469 ns/op
# Warmup Iteration   2: 2235363.679 ns/op
# Warmup Iteration   3: 2241822.120 ns/op
# Warmup Iteration   4: 2233345.144 ns/op
# Warmup Iteration   5: 2222706.600 ns/op
Iteration   1: 2100434.250 ns/op
Iteration   2: 2097353.030 ns/op
Iteration   3: 2133263.076 ns/op
Iteration   4: 2048687.300 ns/op
Iteration   5: 2046222.975 ns/op

# Run progress: 40.00% complete, ETA 00:45:15
# Fork: 4 of 5
# Warmup Iteration   1: 2099352.130 ns/op
# Warmup Iteration   2: 2352367.215 ns/op
# Warmup Iteration   3: 2331797.878 ns/op
# Warmup Iteration   4: 2237189.709 ns/op
# Warmup Iteration   5: 2300014.095 ns/op
Iteration   1: 2218060.953 ns/op
Iteration   2: 2364284.992 ns/op
Iteration   3: 2330102.926 ns/op
Iteration   4: 2323436.748 ns/op
Iteration   5: 2283122.194 ns/op

# Run progress: 42.22% complete, ETA 00:43:35
# Fork: 5 of 5
# Warmup Iteration   1: 2305056.879 ns/op
# Warmup Iteration   2: 2276502.480 ns/op
# Warmup Iteration   3: 2285548.618 ns/op
# Warmup Iteration   4: 2421032.873 ns/op
# Warmup Iteration   5: 2421462.551 ns/op
Iteration   1: 2378152.888 ns/op
Iteration   2: 2233180.308 ns/op
Iteration   3: 2298024.305 ns/op
Iteration   4: 2316953.255 ns/op
Iteration   5: 2393437.760 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test1New":
  2203384.443 ?99.9%) 100739.661 ns/op [Average]

  (min, avg, max) = (2040438.066, 2203384.443, 2466840.838), stdev = 134484.565
  CI (99.9%): [2102644.782, 2304124.103] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test1NewInline

# Run progress: 44.44% complete, ETA 00:41:54
# Fork: 1 of 5
# Warmup Iteration   1: 2432500.607 ns/op
# Warmup Iteration   2: 2647328.930 ns/op
# Warmup Iteration   3: 2452659.294 ns/op
# Warmup Iteration   4: 2563093.390 ns/op
# Warmup Iteration   5: 2590859.741 ns/op
Iteration   1: 2300172.631 ns/op
Iteration   2: 2280273.986 ns/op
Iteration   3: 2415869.747 ns/op
Iteration   4: 2458107.840 ns/op
Iteration   5: 2473778.185 ns/op

# Run progress: 46.67% complete, ETA 00:40:14
# Fork: 2 of 5
# Warmup Iteration   1: 2545584.602 ns/op
# Warmup Iteration   2: 2899147.435 ns/op
# Warmup Iteration   3: 2532247.392 ns/op
# Warmup Iteration   4: 2287584.587 ns/op
# Warmup Iteration   5: 2251588.744 ns/op
Iteration   1: 2187909.582 ns/op
Iteration   2: 2241326.798 ns/op
Iteration   3: 2253805.926 ns/op
Iteration   4: 2202241.268 ns/op
Iteration   5: 2415944.444 ns/op

# Run progress: 48.89% complete, ETA 00:38:33
# Fork: 3 of 5
# Warmup Iteration   1: 2329673.508 ns/op
# Warmup Iteration   2: 2516915.576 ns/op
# Warmup Iteration   3: 2340724.175 ns/op
# Warmup Iteration   4: 2322373.880 ns/op
# Warmup Iteration   5: 2043788.476 ns/op
Iteration   1: 2055118.245 ns/op
Iteration   2: 2036965.424 ns/op
Iteration   3: 2273757.399 ns/op
Iteration   4: 2289730.266 ns/op
Iteration   5: 2268470.118 ns/op

# Run progress: 51.11% complete, ETA 00:36:53
# Fork: 4 of 5
# Warmup Iteration   1: 2314722.587 ns/op
# Warmup Iteration   2: 2266137.766 ns/op
# Warmup Iteration   3: 2305598.386 ns/op
# Warmup Iteration   4: 2299486.322 ns/op
# Warmup Iteration   5: 2363969.983 ns/op
Iteration   1: 2380796.240 ns/op
Iteration   2: 2478518.439 ns/op
Iteration   3: 2541582.266 ns/op
Iteration   4: 2426567.661 ns/op
Iteration   5: 2376820.651 ns/op

# Run progress: 53.33% complete, ETA 00:35:12
# Fork: 5 of 5
# Warmup Iteration   1: 2362718.923 ns/op
# Warmup Iteration   2: 2282046.658 ns/op
# Warmup Iteration   3: 2398391.535 ns/op
# Warmup Iteration   4: 2350291.492 ns/op
# Warmup Iteration   5: 2311804.269 ns/op
Iteration   1: 2393378.440 ns/op
Iteration   2: 2288235.758 ns/op
Iteration   3: 2229176.555 ns/op
Iteration   4: 2246076.173 ns/op
Iteration   5: 2285064.870 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test1NewInline":
  2311987.557 ?99.9%) 93408.325 ns/op [Average]

  (min, avg, max) = (2036965.424, 2311987.557, 2541582.266), stdev = 124697.441
  CI (99.9%): [2218579.232, 2405395.881] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test1Old

# Run progress: 55.56% complete, ETA 00:33:32
# Fork: 1 of 5
# Warmup Iteration   1: 2377977.698 ns/op
# Warmup Iteration   2: 2515927.874 ns/op
# Warmup Iteration   3: 3044256.330 ns/op
# Warmup Iteration   4: 2434315.162 ns/op
# Warmup Iteration   5: 2527498.332 ns/op
Iteration   1: 2397003.954 ns/op
Iteration   2: 2444239.751 ns/op
Iteration   3: 3196526.782 ns/op
Iteration   4: 3386177.116 ns/op
Iteration   5: 2644706.346 ns/op

# Run progress: 57.78% complete, ETA 00:31:51
# Fork: 2 of 5
# Warmup Iteration   1: 2218181.973 ns/op
# Warmup Iteration   2: 2462817.286 ns/op
# Warmup Iteration   3: 2777060.011 ns/op
# Warmup Iteration   4: 2583705.346 ns/op
# Warmup Iteration   5: 2522079.224 ns/op
Iteration   1: 2617015.934 ns/op
Iteration   2: 2599625.318 ns/op
Iteration   3: 2654190.634 ns/op
Iteration   4: 2669915.724 ns/op
Iteration   5: 3110569.733 ns/op

# Run progress: 60.00% complete, ETA 00:30:10
# Fork: 3 of 5
# Warmup Iteration   1: 2617144.691 ns/op
# Warmup Iteration   2: 2737680.005 ns/op
# Warmup Iteration   3: 3009896.118 ns/op
# Warmup Iteration   4: 3206582.815 ns/op
# Warmup Iteration   5: 2605762.594 ns/op
Iteration   1: 2463134.622 ns/op
Iteration   2: 2765426.928 ns/op
Iteration   3: 2680298.419 ns/op
Iteration   4: 2581400.129 ns/op
Iteration   5: 2677096.607 ns/op

# Run progress: 62.22% complete, ETA 00:28:30
# Fork: 4 of 5
# Warmup Iteration   1: 2324112.105 ns/op
# Warmup Iteration   2: 2551025.325 ns/op
# Warmup Iteration   3: 2682065.755 ns/op
# Warmup Iteration   4: 3001461.626 ns/op
# Warmup Iteration   5: 2668335.342 ns/op
Iteration   1: 2696379.482 ns/op
Iteration   2: 2538083.760 ns/op
Iteration   3: 2625639.397 ns/op
Iteration   4: 2591854.366 ns/op
Iteration   5: 2648911.679 ns/op

# Run progress: 64.44% complete, ETA 00:26:49
# Fork: 5 of 5
# Warmup Iteration   1: 2276253.277 ns/op
# Warmup Iteration   2: 2493182.083 ns/op
# Warmup Iteration   3: 2604327.206 ns/op
# Warmup Iteration   4: 2706662.544 ns/op
# Warmup Iteration   5: 2580364.964 ns/op
Iteration   1: 2543079.507 ns/op
Iteration   2: 2736347.469 ns/op
Iteration   3: 3073357.051 ns/op
Iteration   4: 2620306.759 ns/op
Iteration   5: 2366617.605 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test1Old":
  2693116.203 ?99.9%) 185341.611 ns/op [Average]

  (min, avg, max) = (2366617.605, 2693116.203, 3386177.116), stdev = 247425.748
  CI (99.9%): [2507774.592, 2878457.814] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test2New

# Run progress: 66.67% complete, ETA 00:25:08
# Fork: 1 of 5
# Warmup Iteration   1: 4561011.126 ns/op
# Warmup Iteration   2: 4297673.368 ns/op
# Warmup Iteration   3: 5622793.479 ns/op
# Warmup Iteration   4: 6202398.140 ns/op
# Warmup Iteration   5: 5108787.538 ns/op
Iteration   1: 4777495.989 ns/op
Iteration   2: 4755649.358 ns/op
Iteration   3: 4939464.938 ns/op
Iteration   4: 4819075.481 ns/op
Iteration   5: 4960220.377 ns/op

# Run progress: 68.89% complete, ETA 00:23:28
# Fork: 2 of 5
# Warmup Iteration   1: 4433225.178 ns/op
# Warmup Iteration   2: 4266509.510 ns/op
# Warmup Iteration   3: 4723830.987 ns/op
# Warmup Iteration   4: 4823708.872 ns/op
# Warmup Iteration   5: 4789934.100 ns/op
Iteration   1: 4653393.439 ns/op
Iteration   2: 4540897.186 ns/op
Iteration   3: 4564782.154 ns/op
Iteration   4: 4788598.947 ns/op
Iteration   5: 4751541.330 ns/op

# Run progress: 71.11% complete, ETA 00:21:47
# Fork: 3 of 5
# Warmup Iteration   1: 4264341.219 ns/op
# Warmup Iteration   2: 4245952.603 ns/op
# Warmup Iteration   3: 4626748.751 ns/op
# Warmup Iteration   4: 4843764.116 ns/op
# Warmup Iteration   5: 5257025.118 ns/op
Iteration   1: 4538335.028 ns/op
Iteration   2: 4814007.988 ns/op
Iteration   3: 4794669.367 ns/op
Iteration   4: 4843054.695 ns/op
Iteration   5: 4829530.807 ns/op

# Run progress: 73.33% complete, ETA 00:20:07
# Fork: 4 of 5
# Warmup Iteration   1: 4389884.598 ns/op
# Warmup Iteration   2: 4329714.496 ns/op
# Warmup Iteration   3: 4817897.357 ns/op
# Warmup Iteration   4: 4976932.935 ns/op
# Warmup Iteration   5: 5080313.814 ns/op
Iteration   1: 5040700.252 ns/op
Iteration   2: 5027983.819 ns/op
Iteration   3: 5016002.056 ns/op
Iteration   4: 5502372.057 ns/op
Iteration   5: 5386916.532 ns/op

# Run progress: 75.56% complete, ETA 00:18:26
# Fork: 5 of 5
# Warmup Iteration   1: 4793346.551 ns/op
# Warmup Iteration   2: 4790998.851 ns/op
# Warmup Iteration   3: 5206477.876 ns/op
# Warmup Iteration   4: 5084307.063 ns/op
# Warmup Iteration   5: 5376581.784 ns/op
Iteration   1: 5089852.366 ns/op
Iteration   2: 5012025.050 ns/op
Iteration   3: 5033387.424 ns/op
Iteration   4: 5023582.380 ns/op
Iteration   5: 5301262.427 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test2New":
  4912192.058 ?99.9%) 182860.479 ns/op [Average]

  (min, avg, max) = (4538335.028, 4912192.058, 5502372.057), stdev = 244113.508
  CI (99.9%): [4729331.579, 5095052.537] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test2NewInline

# Run progress: 77.78% complete, ETA 00:16:45
# Fork: 1 of 5
# Warmup Iteration   1: 6812844.005 ns/op
# Warmup Iteration   2: 7361846.946 ns/op
# Warmup Iteration   3: 6314917.172 ns/op
# Warmup Iteration   4: 5514344.818 ns/op
# Warmup Iteration   5: 4573342.615 ns/op
Iteration   1: 4367346.769 ns/op
Iteration   2: 4196451.762 ns/op
Iteration   3: 4850605.771 ns/op
Iteration   4: 4700119.361 ns/op
Iteration   5: 4789465.055 ns/op

# Run progress: 80.00% complete, ETA 00:15:05
# Fork: 2 of 5
# Warmup Iteration   1: 6680681.976 ns/op
# Warmup Iteration   2: 6157972.492 ns/op
# Warmup Iteration   3: 6132428.571 ns/op
# Warmup Iteration   4: 5038364.904 ns/op
# Warmup Iteration   5: 4707730.400 ns/op
Iteration   1: 4383523.093 ns/op
Iteration   2: 4410385.317 ns/op
Iteration   3: 4616303.415 ns/op
Iteration   4: 4546104.045 ns/op
Iteration   5: 4652900.698 ns/op

# Run progress: 82.22% complete, ETA 00:13:24
# Fork: 3 of 5
# Warmup Iteration   1: 6452076.194 ns/op
# Warmup Iteration   2: 6240882.970 ns/op
# Warmup Iteration   3: 6404174.072 ns/op
# Warmup Iteration   4: 5725149.685 ns/op
# Warmup Iteration   5: 4811535.787 ns/op
Iteration   1: 4782619.751 ns/op
Iteration   2: 5031695.321 ns/op
Iteration   3: 4732139.877 ns/op
Iteration   4: 4436695.608 ns/op
Iteration   5: 4588490.459 ns/op

# Run progress: 84.44% complete, ETA 00:11:44
# Fork: 4 of 5
# Warmup Iteration   1: 6199606.011 ns/op
# Warmup Iteration   2: 6008727.868 ns/op
# Warmup Iteration   3: 6104671.142 ns/op
# Warmup Iteration   4: 4986448.604 ns/op
# Warmup Iteration   5: 4492854.852 ns/op
Iteration   1: 4941042.095 ns/op
Iteration   2: 4427786.012 ns/op
Iteration   3: 4169051.271 ns/op
Iteration   4: 4298162.226 ns/op
Iteration   5: 4471264.282 ns/op

# Run progress: 86.67% complete, ETA 00:10:03
# Fork: 5 of 5
# Warmup Iteration   1: 5940940.439 ns/op
# Warmup Iteration   2: 6073210.808 ns/op
# Warmup Iteration   3: 7042467.958 ns/op
# Warmup Iteration   4: 4998285.157 ns/op
# Warmup Iteration   5: 4120664.936 ns/op
Iteration   1: 4823124.892 ns/op
Iteration   2: 5203985.915 ns/op
Iteration   3: 4857779.650 ns/op
Iteration   4: 4612683.449 ns/op
Iteration   5: 4410548.633 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test2NewInline":
  4612010.989 ?99.9%) 195294.419 ns/op [Average]

  (min, avg, max) = (4169051.271, 4612010.989, 5203985.915), stdev = 260712.462
  CI (99.9%): [4416716.570, 4807305.408] (assumes normal distribution)


# JMH version: 1.21
# VM version: JDK 13.0.2, OpenJDK 64-Bit Server VM, 13.0.2+8
# VM invoker: C:\jdk-13.0.2+8\bin\java.exe
# VM options: <none>
# 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.CharSequenceUtilsRegionMatchesTest.test2Old

# Run progress: 88.89% complete, ETA 00:08:23
# Fork: 1 of 5
# Warmup Iteration   1: 4386628.026 ns/op
# Warmup Iteration   2: 4409159.497 ns/op
# Warmup Iteration   3: 4697640.141 ns/op
# Warmup Iteration   4: 4999809.795 ns/op
# Warmup Iteration   5: 5404947.326 ns/op
Iteration   1: 5514192.007 ns/op
Iteration   2: 5602226.260 ns/op
Iteration   3: 5752275.043 ns/op
Iteration   4: 5652768.871 ns/op
Iteration   5: 6091266.626 ns/op

# Run progress: 91.11% complete, ETA 00:06:42
# Fork: 2 of 5
# Warmup Iteration   1: 5328853.797 ns/op
# Warmup Iteration   2: 4943080.435 ns/op
# Warmup Iteration   3: 5106661.001 ns/op
# Warmup Iteration   4: 5622510.512 ns/op
# Warmup Iteration   5: 6063115.758 ns/op
Iteration   1: 5690946.928 ns/op
Iteration   2: 5560430.795 ns/op
Iteration   3: 5356928.227 ns/op
Iteration   4: 5326942.972 ns/op
Iteration   5: 5689312.799 ns/op

# Run progress: 93.33% complete, ETA 00:05:01
# Fork: 3 of 5
# Warmup Iteration   1: 5078255.787 ns/op
# Warmup Iteration   2: 4970025.633 ns/op
# Warmup Iteration   3: 4841656.147 ns/op
# Warmup Iteration   4: 5353851.338 ns/op
# Warmup Iteration   5: 5602909.580 ns/op
Iteration   1: 6098516.890 ns/op
Iteration   2: 5834075.743 ns/op
Iteration   3: 6132902.818 ns/op
Iteration   4: 5757714.105 ns/op
Iteration   5: 5581881.306 ns/op

# Run progress: 95.56% complete, ETA 00:03:21
# Fork: 4 of 5
# Warmup Iteration   1: 5151991.349 ns/op
# Warmup Iteration   2: 5046963.169 ns/op
# Warmup Iteration   3: 5166201.394 ns/op
# Warmup Iteration   4: 5914769.426 ns/op
# Warmup Iteration   5: 5724368.879 ns/op
Iteration   1: 5365006.166 ns/op
Iteration   2: 5477824.589 ns/op
Iteration   3: 6803552.617 ns/op
Iteration   4: 6591224.737 ns/op
Iteration   5: 5230821.234 ns/op

# Run progress: 97.78% complete, ETA 00:01:40
# Fork: 5 of 5
# Warmup Iteration   1: 5601439.082 ns/op
# Warmup Iteration   2: 6338512.738 ns/op
# Warmup Iteration   3: 5459651.937 ns/op
# Warmup Iteration   4: 5780962.312 ns/op
# Warmup Iteration   5: 5802922.389 ns/op
Iteration   1: 5515205.402 ns/op
Iteration   2: 5841633.334 ns/op
Iteration   3: 5248565.792 ns/op
Iteration   4: 5204489.646 ns/op
Iteration   5: 5265761.895 ns/op


Result "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test2Old":
  5687458.672 ?99.9%) 303590.959 ns/op [Average]

  (min, avg, max) = (5204489.646, 5687458.672, 6803552.617), stdev = 405285.244
  CI (99.9%): [5383867.713, 5991049.631] (assumes normal distribution)


# Run complete. Total time: 01:15:27

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
CharSequenceUtilsRegionMatchesTest.test0New        avgt   25  2455031.505 ? 82596.431  ns/op

CharSequenceUtilsRegionMatchesTest.test0NewInline  avgt   25  2210111.711 ? 61020.046  ns/op

CharSequenceUtilsRegionMatchesTest.test0Old        avgt   25  2676355.399 ?113788.180  ns/op

CharSequenceUtilsRegionMatchesTest.test1New        avgt   25  2203384.443 ?100739.661  ns/op

CharSequenceUtilsRegionMatchesTest.test1NewInline  avgt   25  2311987.557 ? 93408.325  ns/op

CharSequenceUtilsRegionMatchesTest.test1Old        avgt   25  2693116.203 ?185341.611  ns/op

CharSequenceUtilsRegionMatchesTest.test2New        avgt   25  4912192.058 ?182860.479  ns/op

CharSequenceUtilsRegionMatchesTest.test2NewInline  avgt   25  4612010.989 ?195294.419  ns/op

CharSequenceUtilsRegionMatchesTest.test2Old        avgt   25  5687458.672 ?303590.959  ns/op


Benchmark result is saved to target/jmh-result.org.apache.json

XenoAmess · 2020-06-05T14:41:37Z

result json:

[
    {
        "jmhVersion" : "1.21",
        "benchmark" : "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test0New",
        "mode" : "avgt",
        "threads" : 1,
        "forks" : 5,
        "jvm" : "C:\\jdk-13.0.2+8\\bin\\java.exe",
        "jvmArgs" : [
        ],
        "jdkVersion" : "13.0.2",
        "vmName" : "OpenJDK 64-Bit Server VM",
        "vmVersion" : "13.0.2+8",
        "warmupIterations" : 5,
        "warmupTime" : "10 s",
        "warmupBatchSize" : 1,
        "measurementIterations" : 5,
        "measurementTime" : "10 s",
        "measurementBatchSize" : 1,
        "primaryMetric" : {
            "score" : 2455031.50487269,
            "scoreError" : 82596.43118906298,
            "scoreConfidence" : [
                2372435.073683627,
                2537627.936061753
            ],
            "scorePercentiles" : {
                "0.0" : 2299801.7932858127,
                "50.0" : 2442310.061050061,
                "90.0" : 2638215.5304203783,
                "95.0" : 2652540.041246207,
                "99.0" : 2653839.453435925,
                "99.9" : 2653839.453435925,
                "99.99" : 2653839.453435925,
                "99.999" : 2653839.453435925,
                "99.9999" : 2653839.453435925,
                "100.0" : 2653839.453435925
            },
            "scoreUnit" : "ns/op",
            "rawData" : [
                [
                    2461469.0622692592,
                    2442310.061050061,
                    2427010.385828682,
                    2421185.7661583154,
                    2419471.335268505
                ],
                [
                    2451503.3578431373,
                    2598355.2091452326,
                    2466372.503082614,
                    2653839.453435925,
                    2618707.4083769633
                ],
                [
                    2476611.1906412477,
                    2419733.68037745,
                    2508645.0714823175,
                    2410321.065075922,
                    2649508.0794701986
                ],
                [
                    2305189.6752707995,
                    2347030.7604411077,
                    2299801.7932858127,
                    2322225.214766659,
                    2303393.0234860694
                ],
                [
                    2320520.784040826,
                    2630687.1643871646,
                    2464871.97044335,
                    2541760.457433291,
                    2415263.148756339
                ]
            ]
        },
        "secondaryMetrics" : {
        }
    },
    {
        "jmhVersion" : "1.21",
        "benchmark" : "org.apache.commons.lang3.CharSequenceUtilsRegionMatchesTest.test0NewInline",
        "mode" : "avgt",
        "threads" : 1,
        "forks" : 5,
        "jvm" : "C:\\jdk-13.0.2+8\\bin\\java.exe",
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XenoAmess · 2020-06-13T18:37:03Z

I have no idea why the travis-ci got "pending" here(for several days already).
I will try to retrigger it, using some force-push things.
----------
done.

XenoAmess · 2021-02-21T16:16:53Z

@garydgregory rebased. please find some time to review. thanks.

XenoAmess changed the title ~~split regionMatches for better performance~~ [LANG-1548] split regionMatches for better performance May 31, 2020

dota17 reviewed Jun 5, 2020

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Comment thread src/main/java/org/apache/commons/lang3/CharSequenceUtils.java

XenoAmess force-pushed the split_regionMatches_for_better_performance branch from 6107787 to 8603778 Compare June 13, 2020 18:35

XenoAmess force-pushed the split_regionMatches_for_better_performance branch from 67f345f to d1202c2 Compare June 27, 2020 11:14

split regionMatches for better performance

d9be6a3

XenoAmess force-pushed the split_regionMatches_for_better_performance branch from c5a7915 to d9be6a3 Compare February 21, 2021 16:15

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[LANG-1548] split regionMatches for better performance#534

[LANG-1548] split regionMatches for better performance#534
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