Programming Language and compiler
Benchmarks

C VS Java benchmarks

Current benchmark data was generated on Tue Jul 01 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.)

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 1.2ms 0.0ms 2.1MB 0ms 0ms gcc 15.1.0
c 1.c 1.3ms 0.1ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 1.3ms 0.2ms 1.3MB 0ms 0ms zigcc 0.14.1
java 1.java 68ms 2.0ms 53.3MB 70ms 20ms graal/jvm 17.0.8
java 1.java 68ms 4.0ms 43.9MB 80ms 14ms openjdk 21
java 1.java 72ms 5.5ms 44.8MB 78ms 16ms openjdk 23
java 1.java 196ms 9.1ms 42.9MB 88ms 144ms openjdk/zgc 21

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 171ms 3.7ms 24.2MB 403ms 10ms gcc 15.1.0
c 1-m.c 298ms 5.1ms 25.7MB 993ms 23ms clang 14.0.0-1ubuntu1.1
java 3-m.java 1081ms 28ms 129.1MB 3710ms 43ms openjdk 21
java 3-m.java 1087ms 27ms 155.1MB 3707ms 47ms openjdk 23
java 3-m.java 1130ms 18ms 179.6MB 3870ms 73ms graal/jvm 17.0.8
java 3-m.java 1435ms 53ms 178.4MB 4543ms 197ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 28ms 1.2ms 13.6MB 60ms 0ms gcc 15.1.0
c 1-m.c 39ms 0.8ms 15.0MB 110ms 0ms clang 14.0.0-1ubuntu1.1
java 3-m.java 320ms 28ms 99.9MB 910ms 47ms openjdk 21
java 3-m.java 336ms 9.0ms 135.5MB 920ms 57ms graal/jvm 17.0.8
java 3-m.java 347ms 8.1ms 87.4MB 1017ms 40ms openjdk 23
java 3-m.java 448ms 10ms 98.2MB 920ms 170ms openjdk/zgc 21

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 231ms 18ms 7.6MB 853ms 10ms clang 14.0.0-1ubuntu1.1
c 1-mffi.c 264ms 0.4ms 6.6MB 820ms 0ms gcc 15.1.0
c 1-mffi.c 331ms 2.3ms 6.0MB 320ms 0ms zigcc 0.14.1
c 1-ffi.c 332ms 1.4ms 6.1MB 320ms 0ms zigcc 0.14.1
c 1-ffi.c 455ms 3.6ms 6.5MB 443ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 542ms 0.4ms 6.8MB 530ms 0ms gcc 15.1.0
java 1b.java 1154ms 7.7ms 54.5MB 1260ms 23ms openjdk 21
java 1b.java 1158ms 8.6ms 55.4MB 1263ms 17ms openjdk 23
java 1b.java 1190ms 17ms 109.7MB 1387ms 47ms graal/jvm 17.0.8
java 1.java 1259ms 7.0ms 136.2MB 1380ms 50ms graal/jvm 17.0.8
java 1b.java 1282ms 13ms 51.2MB 1270ms 140ms openjdk/zgc 21
java 1a.java 1656ms 1.6ms 54.8MB 1757ms 17ms openjdk 21
java 1a.java 1660ms 3.6ms 56.3MB 1753ms 23ms openjdk 23
java 1a.java 1690ms 14ms 102.2MB 1800ms 43ms graal/jvm 17.0.8
java 1.java 1709ms 9.7ms 202.6MB 1787ms 43ms openjdk 21
java 1.java 1718ms 5.4ms 321.5MB 1777ms 60ms openjdk 23
java 1a.java 1782ms 8.3ms 51.5MB 1760ms 143ms openjdk/zgc 21
java 1.java 2376ms 9.9ms 850.3MB 1817ms 667ms openjdk/zgc 21
java 2.java timeout 0.0ms 672.1MB 5283ms 120ms openjdk 21
java 2.java timeout 0.0ms 847.1MB 5267ms 137ms openjdk 23
java 2.java timeout 0.0ms 3283.8MB 3427ms 1940ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 16ms 0.8ms 4.5MB 40ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 16ms 0.2ms 3.0MB 10ms 0ms zigcc 0.14.1
c 1-mffi.c 16ms 0.2ms 3.0MB 10ms 0ms zigcc 0.14.1
c 1-mffi.c 18ms 0.4ms 3.6MB 43ms 0ms gcc 15.1.0
c 1-ffi.c 24ms 5.3ms 3.6MB 13ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 26ms 0.9ms 3.9MB 20ms 0ms gcc 15.1.0
java 1b-m.java 180ms 4.0ms 50.8MB 270ms 27ms openjdk 23
java 1b-m.java 182ms 15ms 49.7MB 283ms 23ms openjdk 21
java 1a-m.java 192ms 2.2ms 50.8MB 293ms 23ms openjdk 21
java 1a-m.java 198ms 3.9ms 52.1MB 303ms 20ms openjdk 23
java 1-m.java 199ms 1.7ms 81.7MB 277ms 27ms openjdk 21
java 1-m.java 199ms 7.0ms 87.3MB 283ms 27ms openjdk 23
java 1-m.java 200ms 1.5ms 111.5MB 313ms 43ms graal/jvm 17.0.8
java 1a-m.java 216ms 7.4ms 98.7MB 323ms 43ms graal/jvm 17.0.8
java 1b-m.java 226ms 18ms 100.4MB 377ms 43ms graal/jvm 17.0.8
java 1b.java 304ms 9.9ms 47.5MB 293ms 140ms openjdk/zgc 21
java 1a.java 314ms 2.6ms 48.2MB 297ms 143ms openjdk/zgc 21
java 1.java 329ms 3.7ms 114.4MB 257ms 163ms openjdk/zgc 21
java 2-m.java 550ms 6.6ms 665.0MB 837ms 90ms openjdk 21
java 2-m.java 585ms 8.5ms 787.7MB 880ms 107ms openjdk 23
java 2.java 1592ms 5.9ms 1310.6MB 857ms 1047ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 269ms 3.0ms 1.5MB 260ms 0ms zigcc 0.14.1
c 8-i.c 300ms 0.9ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 309ms 1.8ms 2.3MB 300ms 0ms gcc 15.1.0
c 2.c 313ms 2.3ms 1.5MB 300ms 0ms zigcc 0.14.1
c 5.c 313ms 0.7ms 2.3MB 300ms 0ms gcc 15.1.0
c 5.c 315ms 0.5ms 1.5MB 307ms 0ms zigcc 0.14.1
c 5.c 317ms 2.1ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 318ms 2.8ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 337ms 0.8ms 2.3MB 330ms 0ms gcc 15.1.0
java 1.java 443ms 3.6ms 45.4MB 480ms 13ms openjdk 21
java 1.java 446ms 6.4ms 47.9MB 480ms 20ms openjdk 23
java 1.java 455ms 2.3ms 81.4MB 487ms 30ms graal/jvm 17.0.8
java 1.java 580ms 0.9ms 44.8MB 493ms 150ms openjdk/zgc 21
java 2.java 1243ms 4.5ms 648.2MB 1370ms 90ms openjdk 21
java 2.java 1261ms 7.3ms 751.2MB 1393ms 93ms openjdk 23
java 2.java 3304ms 20ms 2374.4MB 1653ms 1870ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 29ms 0.5ms 1.5MB 20ms 0ms zigcc 0.14.1
c 8-i.c 33ms 0.5ms 2.1MB 27ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 33ms 0.3ms 1.5MB 30ms 0ms zigcc 0.14.1
c 2.c 34ms 0.5ms 2.3MB 23ms 0ms gcc 15.1.0
c 5.c 34ms 0.6ms 2.3MB 30ms 0ms gcc 15.1.0
c 5.c 34ms 0.1ms 1.5MB 30ms 0ms zigcc 0.14.1
c 2.c 34ms 0.9ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 35ms 0.9ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 36ms 0.4ms 2.3MB 30ms 0ms gcc 15.1.0
java 1.java 122ms 0.7ms 45.1MB 160ms 20ms openjdk 21
java 1.java 124ms 0.3ms 47.8MB 157ms 23ms openjdk 23
java 1.java 127ms 6.3ms 81.5MB 160ms 30ms graal/jvm 17.0.8
java 1.java 251ms 6.5ms 45.0MB 157ms 150ms openjdk/zgc 21
java 2-m.java 303ms 5.7ms 354.8MB 453ms 53ms openjdk 21
java 2-m.java 317ms 4.5ms 410.3MB 467ms 63ms openjdk 23
java 2.java 682ms 14ms 525.1MB 473ms 400ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 280ms 23ms 41.1MB 263ms 0ms gcc 15.1.0
c 1.c 300ms 13ms 40.3MB 283ms 0ms zigcc 0.14.1
c 1.c 311ms 7.1ms 40.8MB 293ms 0ms clang 14.0.0-1ubuntu1.1
java 1.java 410ms 19ms 114.9MB 453ms 23ms openjdk 21
java 1.java 466ms 60ms 118.1MB 510ms 23ms openjdk 23
java 1.java 593ms 9.5ms 112.7MB 503ms 167ms openjdk/zgc 21
java 1-m.java 726ms 65ms 268.1MB 1057ms 93ms graal/jvm 17.0.8
java 2.java 783ms 3.1ms 57.6MB 843ms 20ms openjdk 21
java 2.java 785ms 1.4ms 60.4MB 833ms 20ms openjdk 23
java 2.java 848ms 8.5ms 53.3MB 773ms 150ms openjdk/zgc 21
java 2-m.java 1319ms 123ms 288.2MB 2240ms 110ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 52ms 3.9ms 11.8MB 43ms 0ms gcc 15.1.0
c 1.c 53ms 3.3ms 11.7MB 43ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 58ms 2.4ms 11.0MB 50ms 0ms zigcc 0.14.1
java 1.java 151ms 3.7ms 68.5MB 197ms 20ms openjdk 23
java 1.java 159ms 0.5ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 214ms 11ms 125.0MB 307ms 40ms graal/jvm 17.0.8
java 2.java 264ms 4.5ms 50.1MB 330ms 17ms openjdk 21
java 2.java 264ms 7.6ms 51.2MB 313ms 20ms openjdk 23
java 1.java 286ms 3.1ms 61.6MB 213ms 150ms openjdk/zgc 21
java 2.java 369ms 1.9ms 47.8MB 310ms 140ms openjdk/zgc 21
java 2-m.java 479ms 3.7ms 198.6MB 820ms 83ms graal/jvm 17.0.8

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 737ms 1.3ms 2.0MB 2893ms 0ms gcc 15.1.0
c 6-im.c 953ms 1.8ms 2.0MB 3750ms 0ms gcc 15.1.0
c 4-m.c 988ms 1.5ms 2.0MB 3890ms 0ms gcc 15.1.0
c 6-im.c 1003ms 2.1ms 3.3MB 3940ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 1120ms 3.0ms 3.3MB 4407ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1161ms 30ms 2.0MB 4523ms 0ms gcc 15.1.0
c 5-im.c 1334ms 14ms 3.3MB 5230ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1836ms 7.3ms 3.3MB 7223ms 7ms clang 14.0.0-1ubuntu1.1
java 2-m.java 1982ms 6.2ms 48.1MB 7593ms 27ms openjdk 21
java 2-m.java 2009ms 7.3ms 48.4MB 7680ms 23ms openjdk 23
java 2-m.java 2122ms 15ms 45.7MB 7580ms 150ms openjdk/zgc 21
java 2-m.java 2530ms 11ms 95.0MB 9480ms 43ms graal/jvm 17.0.8

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 194ms 0.6ms 2.0MB 737ms 0ms gcc 15.1.0
c 6-im.c 245ms 0.6ms 2.0MB 940ms 0ms gcc 15.1.0
c 6-im.c 258ms 0.7ms 3.3MB 990ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 258ms 0.4ms 2.0MB 997ms 0ms gcc 15.1.0
c 4-m.c 287ms 0.2ms 3.3MB 1103ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 295ms 3.4ms 2.0MB 1137ms 0ms gcc 15.1.0
c 5-im.c 342ms 1.7ms 3.3MB 1310ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 464ms 1.1ms 3.3MB 1803ms 0ms clang 14.0.0-1ubuntu1.1
java 2-m.java 606ms 2.2ms 47.4MB 2137ms 20ms openjdk 21
java 2-m.java 616ms 6.8ms 48.8MB 2170ms 27ms openjdk 23
java 2-m.java 737ms 15ms 45.4MB 2170ms 150ms openjdk/zgc 21
java 2-m.java 765ms 14ms 93.1MB 2683ms 40ms graal/jvm 17.0.8

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 56ms 0.8ms 2.0MB 197ms 0ms gcc 15.1.0
c 6-im.c 68ms 0.4ms 2.3MB 247ms 0ms gcc 15.1.0
c 6-im.c 71ms 0.2ms 3.4MB 250ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 72ms 0.5ms 2.0MB 260ms 0ms gcc 15.1.0
c 4-m.c 78ms 0.6ms 3.3MB 280ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 80ms 0.4ms 2.0MB 293ms 0ms gcc 15.1.0
c 5-im.c 93ms 1.9ms 3.3MB 333ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 123ms 0.4ms 3.3MB 453ms 0ms clang 14.0.0-1ubuntu1.1
java 2-m.java 254ms 8.5ms 47.8MB 757ms 17ms openjdk 21
java 2-m.java 255ms 3.4ms 48.9MB 757ms 23ms openjdk 23
java 2-m.java 318ms 15ms 93.3MB 973ms 43ms graal/jvm 17.0.8
java 2-m.java 390ms 8.2ms 45.4MB 777ms 147ms openjdk/zgc 21