Some algorithms to calculate factorial with benchmarks
Inspired by and based on:
Uses JML to do the benchmarking.
How to run
mvn clean install
java -jar target/benchmarks.jar
Benchmark result:
Intel(R) Core(TM)2 Duo CPU P8600 @ 2.40GHz
Benchmark (n) Mode Cnt Score Error Units
MyBenchmark.testFactShift 10 avgt 20 0.455 ± 0.008 us/op
MyBenchmark.testFactShift 100 avgt 20 8.049 ± 0.350 us/op
MyBenchmark.testFactShift 1000 avgt 20 518.921 ± 6.504 us/op
MyBenchmark.testFactShift 10000 avgt 20 67668.330 ± 2790.546 us/op
MyBenchmark.testFactShift 50000 avgt 20 2036408.998 ± 69713.327 us/op
MyBenchmark.testFactShiftTree 10 avgt 20 0.425 ± 0.007 us/op
MyBenchmark.testFactShiftTree 100 avgt 20 6.793 ± 0.315 us/op
MyBenchmark.testFactShiftTree 1000 avgt 20 113.184 ± 4.826 us/op
MyBenchmark.testFactShiftTree 10000 avgt 20 4900.953 ± 50.575 us/op
MyBenchmark.testFactShiftTree 50000 avgt 20 74184.759 ± 338.565 us/op
MyBenchmark.testFactShiftTreeForkJoin 10 avgt 20 17.096 ± 2.125 us/op
MyBenchmark.testFactShiftTreeForkJoin 100 avgt 20 26.018 ± 0.947 us/op
MyBenchmark.testFactShiftTreeForkJoin 1000 avgt 20 148.221 ± 14.371 us/op
MyBenchmark.testFactShiftTreeForkJoin 10000 avgt 20 4070.271 ± 101.217 us/op
MyBenchmark.testFactShiftTreeForkJoin 50000 avgt 20 61906.265 ± 6348.420 us/op
MyBenchmark.testFactTree 10 avgt 20 0.256 ± 0.006 us/op
MyBenchmark.testFactTree 100 avgt 20 4.796 ± 0.023 us/op
MyBenchmark.testFactTree 1000 avgt 20 89.093 ± 1.888 us/op
MyBenchmark.testFactTree 10000 avgt 20 5256.260 ± 24.035 us/op
MyBenchmark.testFactTree 50000 avgt 20 80814.276 ± 1662.423 us/op
MyBenchmark.testFourBlocks 10 avgt 20 0.596 ± 0.020 us/op
MyBenchmark.testFourBlocks 100 avgt 20 7.389 ± 0.054 us/op
MyBenchmark.testFourBlocks 1000 avgt 20 220.170 ± 9.332 us/op
MyBenchmark.testFourBlocks 10000 avgt 20 23732.874 ± 587.253 us/op
MyBenchmark.testFourBlocks 50000 avgt 20 604617.590 ± 16935.473 us/op
MyBenchmark.testNaive 10 avgt 20 0.431 ± 0.009 us/op
MyBenchmark.testNaive 100 avgt 20 8.707 ± 0.073 us/op
MyBenchmark.testNaive 1000 avgt 20 582.665 ± 4.016 us/op
MyBenchmark.testNaive 10000 avgt 20 71488.714 ± 302.861 us/op
MyBenchmark.testNaive 50000 avgt 20 2185448.852 ± 55155.377 us/op
MyBenchmark.testStreamed 10 avgt 20 0.481 ± 0.011 us/op
MyBenchmark.testStreamed 100 avgt 20 9.096 ± 0.377 us/op
MyBenchmark.testStreamed 1000 avgt 20 603.399 ± 26.494 us/op
MyBenchmark.testStreamed 10000 avgt 20 69546.260 ± 2495.295 us/op
MyBenchmark.testStreamed 50000 avgt 20 2034699.821 ± 51516.068 us/op
MyBenchmark.testStreamedParallel 10 avgt 20 4.165 ± 0.131 us/op
MyBenchmark.testStreamedParallel 100 avgt 20 15.012 ± 1.793 us/op
MyBenchmark.testStreamedParallel 1000 avgt 20 152.454 ± 2.113 us/op
MyBenchmark.testStreamedParallel 10000 avgt 20 13391.956 ± 1693.633 us/op
MyBenchmark.testStreamedParallel 50000 avgt 20 298984.321 ± 25689.383 us/op
MyBenchmark.testStreamedParallelShift 10 avgt 20 4.507 ± 0.188 us/op
MyBenchmark.testStreamedParallelShift 100 avgt 20 15.272 ± 0.594 us/op
MyBenchmark.testStreamedParallelShift 1000 avgt 20 143.560 ± 14.585 us/op
MyBenchmark.testStreamedParallelShift 10000 avgt 20 11418.348 ± 184.639 us/op
MyBenchmark.testStreamedParallelShift 50000 avgt 20 301986.118 ± 35801.010 us/op
MyBenchmark.testStreamedShift 10 avgt 20 0.574 ± 0.013 us/op
MyBenchmark.testStreamedShift 100 avgt 20 8.736 ± 0.508 us/op
MyBenchmark.testStreamedShift 1000 avgt 20 512.447 ± 2.588 us/op
MyBenchmark.testStreamedShift 10000 avgt 20 65010.984 ± 3181.843 us/op
MyBenchmark.testStreamedShift 50000 avgt 20 1882692.405 ± 11696.611 us/op
Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
Benchmark (n) Mode Cnt Score Error Units
MyBenchmark.testFactFactorization 10 avgt 20 0,250 ± 0,007 us/op
MyBenchmark.testFactFactorization 100 avgt 20 2,242 ± 0,074 us/op
MyBenchmark.testFactFactorization 1000 avgt 20 78,634 ± 2,613 us/op
MyBenchmark.testFactFactorization 10000 avgt 20 9201,430 ± 219,746 us/op
MyBenchmark.testFactFactorization 50000 avgt 20 280531,670 ± 7423,222 us/op
MyBenchmark.testFactShift 10 avgt 20 0,244 ± 0,007 us/op
MyBenchmark.testFactShift 100 avgt 20 3,606 ± 0,114 us/op
MyBenchmark.testFactShift 1000 avgt 20 156,331 ± 6,954 us/op
MyBenchmark.testFactShift 10000 avgt 20 19168,038 ± 706,043 us/op
MyBenchmark.testFactShift 50000 avgt 20 522962,954 ± 16136,208 us/op
MyBenchmark.testFactShiftTree 10 avgt 20 0,262 ± 0,007 us/op
MyBenchmark.testFactShiftTree 100 avgt 20 3,870 ± 0,190 us/op
MyBenchmark.testFactShiftTree 1000 avgt 20 50,096 ± 2,552 us/op
MyBenchmark.testFactShiftTree 10000 avgt 20 1760,467 ± 83,710 us/op
MyBenchmark.testFactShiftTree 50000 avgt 20 24382,022 ± 537,654 us/op
MyBenchmark.testFactShiftTreeForkJoin 10 avgt 20 16,463 ± 0,160 us/op
MyBenchmark.testFactShiftTreeForkJoin 100 avgt 20 31,198 ± 0,162 us/op
MyBenchmark.testFactShiftTreeForkJoin 1000 avgt 20 65,820 ± 1,556 us/op
MyBenchmark.testFactShiftTreeForkJoin 10000 avgt 20 1171,646 ± 32,452 us/op
MyBenchmark.testFactShiftTreeForkJoin 50000 avgt 20 14627,024 ± 357,196 us/op
MyBenchmark.testFactTree 10 avgt 20 0,147 ± 0,004 us/op
MyBenchmark.testFactTree 100 avgt 20 2,540 ± 0,078 us/op
MyBenchmark.testFactTree 1000 avgt 20 33,496 ± 1,409 us/op
MyBenchmark.testFactTree 10000 avgt 20 1823,560 ± 88,732 us/op
MyBenchmark.testFactTree 50000 avgt 20 27823,839 ± 1022,714 us/op
MyBenchmark.testFourBlocks 10 avgt 20 0,328 ± 0,010 us/op
MyBenchmark.testFourBlocks 100 avgt 20 3,784 ± 0,135 us/op
MyBenchmark.testFourBlocks 1000 avgt 20 74,276 ± 2,289 us/op
MyBenchmark.testFourBlocks 10000 avgt 20 7047,825 ± 208,759 us/op
MyBenchmark.testFourBlocks 50000 avgt 20 182640,939 ± 9012,697 us/op
MyBenchmark.testNaive 10 avgt 20 0,263 ± 0,005 us/op
MyBenchmark.testNaive 100 avgt 20 4,045 ± 0,141 us/op
MyBenchmark.testNaive 1000 avgt 20 184,440 ± 9,611 us/op
MyBenchmark.testNaive 10000 avgt 20 20956,157 ± 822,248 us/op
MyBenchmark.testNaive 50000 avgt 20 594264,702 ± 20885,791 us/op
MyBenchmark.testStreamed 10 avgt 20 0,277 ± 0,009 us/op
MyBenchmark.testStreamed 100 avgt 20 4,094 ± 0,185 us/op
MyBenchmark.testStreamed 1000 avgt 20 160,802 ± 5,950 us/op
MyBenchmark.testStreamed 10000 avgt 20 20089,014 ± 700,531 us/op
MyBenchmark.testStreamed 50000 avgt 20 566642,732 ± 15943,290 us/op
MyBenchmark.testStreamedParallel 10 avgt 20 11,551 ± 0,375 us/op
MyBenchmark.testStreamedParallel 100 avgt 20 20,562 ± 0,231 us/op
MyBenchmark.testStreamedParallel 1000 avgt 20 42,384 ± 1,478 us/op
MyBenchmark.testStreamedParallel 10000 avgt 20 1373,647 ± 20,357 us/op
MyBenchmark.testStreamedParallel 50000 avgt 20 22250,542 ± 343,414 us/op
MyBenchmark.testStreamedParallelShift 10 avgt 20 11,434 ± 0,165 us/op
MyBenchmark.testStreamedParallelShift 100 avgt 20 21,052 ± 0,270 us/op
MyBenchmark.testStreamedParallelShift 1000 avgt 20 39,929 ± 0,502 us/op
MyBenchmark.testStreamedParallelShift 10000 avgt 20 1243,644 ± 21,475 us/op
MyBenchmark.testStreamedParallelShift 50000 avgt 20 20986,001 ± 420,476 us/op
MyBenchmark.testStreamedShift 10 avgt 20 0,307 ± 0,007 us/op
MyBenchmark.testStreamedShift 100 avgt 20 3,969 ± 0,112 us/op
MyBenchmark.testStreamedShift 1000 avgt 20 143,929 ± 5,329 us/op
MyBenchmark.testStreamedShift 10000 avgt 20 18287,292 ± 528,179 us/op
MyBenchmark.testStreamedShift 50000 avgt 20 528949,557 ± 14937,280 us/op
MyBenchmark.testFactShiftTreeForkJoinMinSize 10 avgt 20 12,881 ? 0,679 us/op
MyBenchmark.testFactShiftTreeForkJoinMinSize 100 avgt 20 30,291 ? 0,081 us/op
MyBenchmark.testFactShiftTreeForkJoinMinSize 1000 avgt 20 60,077 ? 0,253 us/op
MyBenchmark.testFactShiftTreeForkJoinMinSize 10000 avgt 20 1130,127 ? 5,061 us/op
MyBenchmark.testFactShiftTreeForkJoinMinSize 50000 avgt 20 13951,768 ? 70,605 us/op
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