Programming Language and compiler
Benchmarks

Java VS C++ benchmarks

Current benchmark data was generated on Tue Mar 25 2025, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] AMD EPYC 7763 64-Core Processor (Model 1)

* -m in a file name stands for multi-threading or multi-processing

* -i in a file name stands for direct intrinsics usage. (Usage of simd intrinsics via libraries is not counted)

* -ffi in a file name stands for non-stdlib FFI usage

* (You may find time < time(user) + time(sys) for some non-parallelized programs, the overhead is from GC or JIT compiler, which are allowed to take advantage of multi-cores as that's more close to real-world scenarios.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 458ms 2.4ms 576.1MB 560ms 83ms openjdk 21
java 2-m.java 468ms 4.5ms 644.9MB 643ms 120ms graal/jvm 17.0.8
java 2.java 483ms 9.4ms 620.6MB 587ms 107ms openjdk 23
java 2.java 1240ms 21ms 1086.3MB 587ms 817ms openjdk/zgc 21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 123ms 4.3ms 98.7MB 163ms 30ms openjdk 23
java 2.java 125ms 5.0ms 169.0MB 153ms 33ms openjdk 21
java 2-m.java 150ms 9.1ms 225.3MB 223ms 57ms graal/jvm 17.0.8
java 2.java 306ms 2.8ms 241.6MB 150ms 210ms openjdk/zgc 21

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 589ms 7.5ms 263.6MB 1617ms 70ms openjdk 21
java 1-m.java 613ms 8.6ms 392.1MB 1177ms 113ms graal/jvm 17.0.8
java 1-m.java 633ms 64ms 222.5MB 1693ms 70ms openjdk 23
java 1-m.java 998ms 3.0ms 504.7MB 1677ms 423ms openjdk/zgc 21

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 305ms 12ms 225.7MB 607ms 63ms graal/jvm 17.0.8
java 1-m.java 328ms 2.2ms 178.0MB 890ms 57ms openjdk 21
java 1-m.java 384ms 21ms 110.9MB 1053ms 53ms openjdk 23
java 1-m.java 529ms 30ms 216.4MB 1050ms 223ms openjdk/zgc 21

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 400ms 5.5ms 2.6MB 1540ms 0ms g++ 11.4.0
cpp 1-im.cpp 409ms 4.1ms 4.0MB 1590ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 894ms 11ms 95.4MB 3297ms 43ms graal/jvm 17.0.8
java 1-m.java 974ms 4.1ms 48.1MB 3630ms 23ms openjdk 21
java 1-m.java 991ms 2.3ms 50.2MB 3637ms 23ms openjdk 23
java 1-m.java 1026ms 24ms 45.7MB 3350ms 143ms openjdk/zgc 21

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 41ms 1.5ms 2.6MB 133ms 0ms g++ 11.4.0
cpp 1-im.cpp 42ms 0.4ms 4.0MB 140ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1-m.java 182ms 6.0ms 48.3MB 493ms 27ms openjdk 21
java 1-m.java 195ms 3.7ms 50.0MB 510ms 20ms openjdk 23
java 1-m.java 210ms 15ms 96.2MB 583ms 43ms graal/jvm 17.0.8
java 1-m.java 307ms 8.3ms 46.8MB 500ms 143ms openjdk/zgc 21

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 445ms 1.1ms 102.4MB 620ms 43ms graal/jvm 17.0.8
java 4.java 456ms 0.4ms 47.7MB 537ms 23ms openjdk 21
java 4.java 456ms 5.6ms 49.1MB 543ms 20ms openjdk 23
java 4.java 571ms 8.5ms 45.1MB 543ms 137ms openjdk/zgc 21

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4-m.java 124ms 5.6ms 91.1MB 173ms 30ms graal/jvm 17.0.8
java 4-m.java 125ms 2.1ms 46.7MB 167ms 23ms openjdk 21
java 4.java 127ms 5.7ms 48.5MB 173ms 13ms openjdk 23
java 4.java 246ms 8.1ms 44.0MB 170ms 137ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.1ms 0.1ms 1.4MB 0ms 0ms g++ 11.4.0
cpp 1.cpp 1.5ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 63ms 2.8ms 52.7MB 70ms 16ms graal/jvm 17.0.8
java 1.java 65ms 2.6ms 43.7MB 74ms 16ms openjdk 21
java 1.java 69ms 4.7ms 44.7MB 72ms 16ms openjdk 23
java 1.java 199ms 6.8ms 42.9MB 84ms 138ms openjdk/zgc 21

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 3-m.java 1032ms 61ms 128.5MB 3537ms 40ms openjdk 21
java 3-m.java 1092ms 33ms 157.0MB 3727ms 67ms openjdk 23
java 3-m.java 1122ms 4.2ms 178.6MB 3850ms 63ms graal/jvm 17.0.8
java 3-m.java 1415ms 34ms 178.6MB 4437ms 210ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 3-m.java 317ms 18ms 89.9MB 897ms 40ms openjdk 21
java 3-m.java 340ms 23ms 90.4MB 1017ms 37ms openjdk 23
java 3-m.java 341ms 15ms 135.6MB 917ms 63ms graal/jvm 17.0.8
java 3-m.java 433ms 1.6ms 98.2MB 893ms 170ms openjdk/zgc 21

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1b.java 1163ms 28ms 53.9MB 1280ms 20ms openjdk 21
java 1b.java 1165ms 9.9ms 55.8MB 1280ms 27ms openjdk 23
java 1b.java 1192ms 10ms 110.0MB 1417ms 40ms graal/jvm 17.0.8
java 1.java 1248ms 2.5ms 138.4MB 1357ms 47ms graal/jvm 17.0.8
java 1b.java 1291ms 16ms 50.8MB 1280ms 143ms openjdk/zgc 21
java 1a.java 1657ms 5.6ms 54.7MB 1757ms 17ms openjdk 21
java 1a.java 1660ms 6.7ms 56.1MB 1760ms 20ms openjdk 23
java 1a.java 1681ms 2.9ms 102.0MB 1790ms 43ms graal/jvm 17.0.8
java 1.java 1702ms 4.3ms 202.0MB 1770ms 40ms openjdk 21
java 1.java 1722ms 3.0ms 320.5MB 1783ms 57ms openjdk 23
java 1a.java 1792ms 6.1ms 51.6MB 1763ms 150ms openjdk/zgc 21
java 1.java 2406ms 36ms 881.5MB 1803ms 710ms openjdk/zgc 21
java 2.java timeout 0.0ms 636.5MB 5327ms 117ms openjdk 21
java 2.java timeout 0.0ms 807.5MB 5327ms 133ms openjdk 23
java 2.java timeout 0.0ms 3477.5MB 3343ms 2040ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1b-m.java 175ms 5.3ms 49.4MB 270ms 27ms openjdk 21
java 1b-m.java 182ms 3.7ms 50.6MB 277ms 20ms openjdk 23
java 1a-m.java 189ms 1.1ms 50.8MB 290ms 20ms openjdk 21
java 1a-m.java 193ms 3.7ms 52.2MB 293ms 27ms openjdk 23
java 1-m.java 193ms 0.6ms 87.2MB 270ms 27ms openjdk 23
java 1-m.java 194ms 5.5ms 82.1MB 270ms 27ms openjdk 21
java 1-m.java 196ms 1.9ms 113.3MB 300ms 43ms graal/jvm 17.0.8
java 1a-m.java 211ms 0.1ms 98.3MB 317ms 40ms graal/jvm 17.0.8
java 1b-m.java 237ms 31ms 101.3MB 403ms 43ms graal/jvm 17.0.8
java 1b.java 316ms 2.2ms 47.7MB 300ms 147ms openjdk/zgc 21
java 1a.java 318ms 2.3ms 49.4MB 297ms 143ms openjdk/zgc 21
java 1.java 339ms 5.1ms 114.1MB 270ms 163ms openjdk/zgc 21
java 2-m.java 564ms 12ms 624.8MB 847ms 90ms openjdk 21
java 2-m.java 581ms 9.4ms 787.4MB 867ms 103ms openjdk 23
java 2.java 1662ms 61ms 1399.5MB 840ms 1130ms openjdk/zgc 21

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 402ms 1.4ms 539.4MB 503ms 83ms openjdk 23
java 1.java 403ms 0.8ms 679.7MB 470ms 100ms openjdk 21
java 1-m.java 407ms 4.5ms 624.7MB 617ms 97ms graal/jvm 17.0.8
java 1.java 1109ms 14ms 993.0MB 460ms 777ms openjdk/zgc 21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 163ms 1.4ms 158.5MB 237ms 47ms openjdk 23
java 1-m.java 167ms 4.0ms 206.4MB 237ms 47ms openjdk 21
java 1-m.java 214ms 4.0ms 253.3MB 350ms 63ms graal/jvm 17.0.8
java 1.java 427ms 11ms 341.8MB 217ms 287ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.1ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.5ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 315ms 0.8ms 2.3MB 307ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 316ms 0.4ms 1.8MB 307ms 0ms g++ 11.4.0
java 1.java 445ms 1.2ms 45.1MB 487ms 17ms openjdk 21
java 1.java 448ms 0.8ms 48.1MB 483ms 20ms openjdk 23
java 1.java 451ms 5.3ms 82.3MB 480ms 30ms graal/jvm 17.0.8
java 1.java 570ms 6.7ms 44.6MB 483ms 140ms openjdk/zgc 21
java 2.java 1247ms 8.3ms 612.0MB 1383ms 87ms openjdk 21
java 2.java 1263ms 12ms 761.8MB 1380ms 107ms openjdk 23
java 2.java 3428ms 91ms 2585.6MB 1647ms 1983ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 19ms 0.1ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 19ms 0.2ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.7ms 1.9MB 30ms 0ms g++ 11.4.0
cpp 1.cpp 34ms 0.7ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 120ms 1.3ms 45.2MB 160ms 20ms openjdk 21
java 1.java 122ms 3.4ms 48.0MB 157ms 17ms openjdk 23
java 1.java 126ms 6.4ms 81.5MB 157ms 30ms graal/jvm 17.0.8
java 1.java 255ms 8.1ms 44.8MB 173ms 147ms openjdk/zgc 21
java 2-m.java 305ms 1.9ms 374.3MB 440ms 63ms openjdk 21
java 2-m.java 314ms 3.5ms 404.5MB 453ms 67ms openjdk 23
java 2.java 718ms 16ms 545.0MB 480ms 433ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 414ms 8.0ms 115.1MB 463ms 23ms openjdk 21
java 1.java 417ms 11ms 118.0MB 453ms 27ms openjdk 23
cpp 1.cpp 485ms 2.1ms 7.3MB 477ms 0ms g++ 11.4.0
cpp 1.cpp 531ms 3.5ms 7.8MB 523ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 598ms 4.7ms 112.6MB 497ms 167ms openjdk/zgc 21
java 1-m.java 645ms 4.3ms 256.4MB 920ms 83ms graal/jvm 17.0.8
java 2.java 783ms 3.4ms 57.0MB 837ms 23ms openjdk 21
java 2.java 785ms 6.3ms 60.3MB 833ms 23ms openjdk 23
java 2.java 856ms 3.3ms 53.4MB 780ms 150ms openjdk/zgc 21
java 2-m.java 1326ms 70ms 214.5MB 2320ms 103ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 119ms 0.4ms 3.6MB 110ms 0ms g++ 11.4.0
cpp 1.cpp 133ms 1.4ms 4.1MB 123ms 0ms clang++ 14.0.0-1ubuntu1.1
java 1.java 158ms 11ms 68.1MB 193ms 30ms openjdk 23
java 1.java 159ms 1.7ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 209ms 17ms 124.7MB 293ms 43ms graal/jvm 17.0.8
java 2.java 261ms 1.6ms 50.5MB 313ms 17ms openjdk 23
java 2.java 261ms 1.8ms 49.9MB 320ms 20ms openjdk 21
java 1.java 292ms 2.3ms 61.4MB 210ms 157ms openjdk/zgc 21
java 2.java 371ms 7.0ms 47.7MB 307ms 143ms openjdk/zgc 21
java 2-m.java 474ms 3.4ms 194.3MB 833ms 70ms graal/jvm 17.0.8

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 3250ms 4.4ms 443.6MB 3687ms 107ms graal/jvm 17.0.8
java 1.java 3741ms 68ms 414.0MB 4627ms 120ms openjdk 23
java 1.java 3777ms 87ms 428.4MB 4617ms 110ms openjdk 21
java 1.java timeout 0.0ms 2126.2MB 4680ms 1213ms openjdk/zgc 21

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 904ms 8.4ms 445.7MB 1267ms 97ms graal/jvm 17.0.8
java 1-m.java 1004ms 16ms 422.6MB 1803ms 87ms openjdk 21
java 1-m.java 1030ms 26ms 432.7MB 1780ms 97ms openjdk 23
java 1.java 2045ms 43ms 1343.3MB 1747ms 1080ms openjdk/zgc 21

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 3.java timeout 0.0ms 407.4MB 5410ms 90ms graal/jvm 17.0.8
java 3.java timeout 0.0ms 302.6MB 5333ms 60ms openjdk 21
java 3.java timeout 0.0ms 304.8MB 5323ms 57ms openjdk 23
java 3.java timeout 0.0ms 466.5MB 4970ms 297ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 3-m.java 780ms 19ms 175.3MB 1153ms 60ms graal/jvm 17.0.8
java 3-m.java 796ms 7.9ms 132.5MB 1203ms 33ms openjdk 23
java 3-m.java 796ms 1.8ms 130.5MB 1183ms 37ms openjdk 21
java 3.java 981ms 13ms 133.4MB 1140ms 190ms openjdk/zgc 21

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 474ms 9.5ms 3.5MB 1827ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 484ms 1.5ms 2.1MB 1883ms 0ms g++ 11.4.0
cpp 6-im.cpp 927ms 9.1ms 2.1MB 3633ms 0ms g++ 11.4.0
cpp 6-im.cpp 928ms 16ms 3.6MB 3630ms 0ms clang++ 14.0.0-1ubuntu1.1
java 2-m.java 1990ms 4.9ms 48.3MB 7590ms 23ms openjdk 21
java 2-m.java 2007ms 4.6ms 48.8MB 7640ms 23ms openjdk 23
java 2-m.java 2118ms 9.6ms 45.4MB 7597ms 150ms openjdk/zgc 21
java 2-m.java 2519ms 21ms 94.5MB 9413ms 47ms graal/jvm 17.0.8

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 124ms 0.6ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 130ms 0.6ms 2.0MB 490ms 0ms g++ 11.4.0
cpp 6-im.cpp 238ms 0.5ms 3.4MB 903ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 240ms 2.0ms 2.1MB 917ms 0ms g++ 11.4.0
java 2-m.java 603ms 2.9ms 47.6MB 2127ms 23ms openjdk 21
java 2-m.java 618ms 4.6ms 49.0MB 2187ms 27ms openjdk 23
java 2-m.java 737ms 4.9ms 45.5MB 2160ms 147ms openjdk/zgc 21
java 2-m.java 775ms 11ms 95.1MB 2713ms 43ms graal/jvm 17.0.8

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 40ms 0.2ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 9.9ms 3.4MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 0.7ms 3.4MB 230ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 67ms 0.4ms 2.1MB 240ms 0ms g++ 11.4.0
java 2-m.java 255ms 0.5ms 47.6MB 760ms 23ms openjdk 21
java 2-m.java 259ms 11ms 48.6MB 767ms 20ms openjdk 23
java 2-m.java 305ms 26ms 96.4MB 910ms 50ms graal/jvm 17.0.8
java 2-m.java 384ms 3.8ms 45.7MB 763ms 150ms openjdk/zgc 21

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 2416ms 202ms 242.7MB 9177ms 143ms openjdk 23
java 1-m.java 2460ms 134ms 259.7MB 9333ms 137ms openjdk 21
java 1-m.java 2898ms 214ms 1236.9MB 9260ms 1187ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 440ms 30ms 92.7MB 1440ms 60ms openjdk 23
java 1-m.java 488ms 40ms 121.4MB 1617ms 60ms openjdk 21
java 1-m.java 671ms 16ms 222.0MB 1810ms 263ms openjdk/zgc 21