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Java performance benchmarks

Some basic Java performance benchmarks for Streams, some Date operations and Strings

Benchmarks are run using JMH and can be built using mvn clean install

Prebuilt jar is included as benchmarks.jar which can be run directly

My test command was java -jar benchmarks.jar -f 1 -i 10 -wi 10 -r 5 which resulted in the output of

Benchmark                                      Mode  Cnt          Score        Error  Units
DateBenchmark.dateLong                        thrpt   10  398180671.307 ± 861095.156  ops/s
DateBenchmark.dateLongWithFormat              thrpt   10    3205290.937 ±  17495.643  ops/s
DateBenchmark.dateParsingWithFormat           thrpt   10     829339.030 ±   5872.319  ops/s
StreamBenchmark.testFor                       thrpt   10       1676.135 ±     33.174  ops/s
StreamBenchmark.testForInLoop                 thrpt   10        543.856 ±      2.759  ops/s
StreamBenchmark.testLargeStream               thrpt   10         95.626 ±      0.480  ops/s
StreamBenchmark.testLargeStreamParallel       thrpt   10        128.419 ±      1.185  ops/s
StreamBenchmark.testStream                    thrpt   10       1637.747 ±     11.793  ops/s
StreamBenchmark.testStreamInLoop              thrpt   10        432.207 ±      1.098  ops/s
StreamBenchmark.testStreamParrallel           thrpt   10       8068.937 ±    260.249  ops/s
StringBenchmark.stringAppend                  thrpt   10   22572323.301 ± 181309.750  ops/s
StringBenchmark.stringAppendBuilder           thrpt   10    6983217.796 ±  54212.734  ops/s
StringBenchmark.stringAppendBuilderLoop       thrpt   10       7202.648 ±    117.500  ops/s
StringBenchmark.stringAppendBuilderLoopSized  thrpt   10       8106.539 ±    135.040  ops/s
StringBenchmark.stringAppendLoop              thrpt   10         11.111 ±      0.373  ops/s
StringBenchmark.stringAppendLoopPlus          thrpt   10         11.624 ±      0.056  ops/s
StringBenchmark.stringAppendLoopPlusDouble    thrpt   10         11.593 ±      0.084  ops/s
StringBenchmark.stringConcat                  thrpt   10  116474840.767 ± 766799.557  ops/s
StringBenchmark.stringCreateLoop              thrpt   10       6404.057 ±     97.817  ops/s
StringBenchmark.stringFormat                  thrpt   10    1384875.999 ±   7025.733  ops/s

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