Programming Language and compiler
Benchmarks

Nim VS Java benchmarks

Current benchmark data was generated on Mon Apr 14 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 461ms 12ms 574.0MB 563ms 83ms openjdk 21
java 2.java 480ms 4.7ms 624.4MB 600ms 97ms openjdk 23
java 2-m.java 481ms 6.8ms 642.9MB 670ms 120ms graal/jvm 17.0.8
nim 2.nim 934ms 16ms 34.6MB 917ms 3ms nim 2.2.2
nim 2.nim 960ms 15ms 34.9MB 947ms 0ms nim/clang 2.2.2
java 2.java 1174ms 6.5ms 1067.3MB 593ms 750ms openjdk/zgc 21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 88ms 1.6ms 5.5MB 80ms 0ms nim 2.2.2
nim 2.nim 91ms 2.6ms 5.8MB 80ms 0ms nim/clang 2.2.2
java 2.java 125ms 2.4ms 165.6MB 157ms 30ms openjdk 21
java 2.java 135ms 5.3ms 96.2MB 173ms 27ms openjdk 23
java 2-m.java 150ms 5.9ms 224.4MB 227ms 53ms graal/jvm 17.0.8
java 2.java 304ms 2.2ms 241.6MB 157ms 203ms 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 2190ms 231ms 262.9MB 8233ms 147ms openjdk 21
java 1-m.java 2460ms 195ms 242.5MB 9323ms 150ms openjdk 23
java 1-m.java 2832ms 160ms 1240.0MB 9087ms 1107ms openjdk/zgc 21
nim 1.nim timeout 0.0ms 559.4MB 2500ms 2040ms nim 2.2.2
nim 1.nim timeout 0.0ms 555.8MB 2460ms 2080ms nim/clang 2.2.2

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 447ms 11ms 94.5MB 1460ms 67ms openjdk 23
java 1-m.java 509ms 45ms 129.8MB 1697ms 60ms openjdk 21
java 1-m.java 673ms 33ms 223.7MB 1810ms 260ms openjdk/zgc 21
nim 1.nim 4313ms 32ms 519.8MB 2100ms 1790ms nim/clang 2.2.2
nim 1.nim 4341ms 20ms 519.4MB 2177ms 1743ms nim 2.2.2

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 187ms 1.4ms 1.5MB 180ms 0ms nim 2.2.2
nim 2.nim 236ms 2.8ms 1.8MB 223ms 0ms nim/clang 2.2.2
java 4.java 446ms 6.7ms 102.7MB 630ms 37ms graal/jvm 17.0.8
java 4.java 453ms 2.9ms 47.7MB 537ms 17ms openjdk 21
java 4.java 462ms 5.5ms 49.0MB 553ms 20ms openjdk 23
nim 1.nim 554ms 2.2ms 1.8MB 453ms 90ms nim/clang 2.2.2
java 4.java 574ms 8.7ms 45.3MB 550ms 140ms openjdk/zgc 21
nim 1.nim 575ms 2.2ms 1.5MB 473ms 90ms nim 2.2.2

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 21ms 0.6ms 1.5MB 10ms 0ms nim 2.2.2
nim 2.nim 26ms 0.3ms 1.8MB 20ms 0ms nim/clang 2.2.2
nim 1.nim 58ms 0.8ms 1.8MB 40ms 0ms nim/clang 2.2.2
nim 1.nim 61ms 0.3ms 1.5MB 40ms 10ms nim 2.2.2
java 4.java 125ms 2.4ms 46.7MB 167ms 20ms openjdk 21
java 4.java 134ms 2.5ms 47.9MB 180ms 20ms openjdk 23
java 4-m.java 134ms 4.6ms 91.8MB 193ms 37ms graal/jvm 17.0.8
java 4.java 250ms 3.6ms 43.9MB 170ms 137ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.1ms 0.1ms 1.5MB 0ms 0ms nim 2.2.2
nim 1.nim 1.1ms 0.1ms 1.9MB 0ms 0ms nim/clang 2.2.2
java 1.java 63ms 1.5ms 52.7MB 70ms 20ms graal/jvm 17.0.8
java 1.java 72ms 3.3ms 44.4MB 74ms 20ms openjdk 23
java 1.java 73ms 1.7ms 43.8MB 80ms 14ms openjdk 21
java 1.java 193ms 6.2ms 43.0MB 84ms 140ms openjdk/zgc 21

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 110ms 0.4ms 1.4MB 100ms 0ms nim 2.2.2
nim 2.nim 114ms 0.7ms 1.9MB 110ms 0ms nim/clang 2.2.2
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.2
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.2

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 326ms 2.2ms 1.4MB 320ms 0ms nim 2.2.2
nim 2.nim 340ms 0.3ms 1.6MB 330ms 0ms nim/clang 2.2.2
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.2
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.2

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 49ms 0.2ms 1.5MB 40ms 0ms nim/clang 2.2.2
nim 2.nim 52ms 1.4ms 1.3MB 43ms 0ms nim 2.2.2
nim 1.nim 446ms 2.7ms 1.5MB 440ms 0ms nim/clang 2.2.2
nim 1.nim 479ms 2.2ms 1.3MB 470ms 0ms nim 2.2.2

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 386ms 0.2ms 4.7MB 380ms 0ms nim/clang 2.2.2
nim 1.nim 576ms 0.7ms 4.4MB 570ms 0ms nim 2.2.2
java 1b.java 1159ms 21ms 54.2MB 1270ms 23ms openjdk 21
java 1b.java 1159ms 17ms 55.4MB 1260ms 27ms openjdk 23
java 1b.java 1192ms 4.2ms 109.8MB 1433ms 40ms graal/jvm 17.0.8
java 1.java 1254ms 4.6ms 136.4MB 1363ms 50ms graal/jvm 17.0.8
java 1b.java 1272ms 4.5ms 51.2MB 1250ms 143ms openjdk/zgc 21
java 1a.java 1655ms 4.3ms 55.0MB 1750ms 23ms openjdk 21
java 1a.java 1666ms 2.2ms 56.4MB 1763ms 33ms openjdk 23
java 1a.java 1688ms 10ms 102.4MB 1807ms 43ms graal/jvm 17.0.8
java 1.java 1699ms 3.2ms 254.4MB 1770ms 43ms openjdk 21
java 1.java 1720ms 3.4ms 336.0MB 1787ms 50ms openjdk 23
java 1a.java 1779ms 9.0ms 51.4MB 1753ms 150ms openjdk/zgc 21
java 1.java 2354ms 1.7ms 859.1MB 1800ms 657ms openjdk/zgc 21
java 2.java timeout 0.0ms 744.5MB 5260ms 140ms openjdk 21
java 2.java timeout 0.0ms 818.4MB 5390ms 137ms openjdk 23
java 2.java timeout 0.0ms 3364.6MB 3493ms 1890ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 18ms 0.2ms 1.9MB 10ms 0ms nim/clang 2.2.2
nim 1.nim 26ms 0.9ms 1.6MB 20ms 0ms nim 2.2.2
java 1b-m.java 179ms 8.2ms 51.3MB 267ms 23ms openjdk 23
java 1-m.java 192ms 1.2ms 81.6MB 270ms 27ms openjdk 21
java 1a-m.java 194ms 6.6ms 51.0MB 300ms 20ms openjdk 21
java 1b-m.java 198ms 17ms 49.5MB 313ms 23ms openjdk 21
java 1.java 201ms 9.8ms 87.3MB 270ms 30ms openjdk 23
java 1a-m.java 202ms 6.2ms 52.6MB 310ms 23ms openjdk 23
java 1-m.java 207ms 12ms 114.4MB 320ms 43ms graal/jvm 17.0.8
java 1a-m.java 207ms 6.5ms 98.8MB 313ms 40ms graal/jvm 17.0.8
java 1b-m.java 244ms 39ms 103.4MB 420ms 43ms graal/jvm 17.0.8
java 1a.java 315ms 5.7ms 47.9MB 297ms 143ms openjdk/zgc 21
java 1b.java 320ms 12ms 48.0MB 320ms 140ms openjdk/zgc 21
java 1.java 337ms 2.0ms 114.6MB 270ms 170ms openjdk/zgc 21
java 2-m.java 551ms 14ms 629.1MB 833ms 87ms openjdk 21
java 2-m.java 605ms 19ms 809.9MB 897ms 120ms openjdk 23
java 2.java 1587ms 1.4ms 1374.8MB 860ms 1043ms openjdk/zgc 21

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 413ms 2.5ms 537.5MB 517ms 87ms openjdk 23
java 1.java 423ms 5.1ms 677.8MB 480ms 113ms openjdk 21
java 1-m.java 427ms 10ms 641.7MB 603ms 127ms graal/jvm 17.0.8
nim 1.nim 532ms 4.4ms 34.6MB 513ms 0ms nim 2.2.2
nim 1.nim 609ms 7.4ms 34.9MB 593ms 0ms nim/clang 2.2.2
java 1.java 1047ms 30ms 965.9MB 463ms 723ms openjdk/zgc 21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 113ms 0.7ms 9.6MB 100ms 0ms nim 2.2.2
nim 1.nim 134ms 2.0ms 9.9MB 123ms 0ms nim/clang 2.2.2
java 1-m.java 171ms 3.8ms 206.1MB 240ms 50ms openjdk 21
java 1-m.java 171ms 0.9ms 158.6MB 250ms 43ms openjdk 23
java 1-m.java 215ms 11ms 253.5MB 353ms 63ms graal/jvm 17.0.8
java 1.java 424ms 13ms 341.9MB 223ms 283ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 319ms 0.9ms 1.8MB 310ms 0ms nim 2.2.2
nim 2.nim 342ms 1.8ms 2.0MB 330ms 0ms nim/clang 2.2.2
java 1.java 449ms 6.5ms 81.4MB 477ms 30ms graal/jvm 17.0.8
java 1.java 451ms 0.4ms 48.3MB 487ms 17ms openjdk 23
java 1.java 457ms 15ms 45.3MB 490ms 17ms openjdk 21
java 1.java 571ms 1.4ms 44.9MB 493ms 137ms openjdk/zgc 21
java 2.java 1260ms 11ms 640.1MB 1390ms 87ms openjdk 21
java 2.java 1275ms 9.1ms 826.3MB 1380ms 123ms openjdk 23
java 2.java 3279ms 125ms 2446.0MB 1647ms 1853ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 34ms 0.6ms 1.8MB 30ms 0ms nim 2.2.2
nim 2.nim 38ms 0.5ms 2.0MB 30ms 0ms nim/clang 2.2.2
java 1.java 118ms 2.8ms 81.5MB 143ms 30ms graal/jvm 17.0.8
java 1.java 123ms 2.0ms 45.2MB 163ms 20ms openjdk 21
java 1.java 124ms 4.2ms 48.2MB 157ms 20ms openjdk 23
java 1.java 251ms 4.1ms 44.9MB 173ms 140ms openjdk/zgc 21
java 2-m.java 305ms 5.3ms 394.5MB 447ms 60ms openjdk 21
java 2-m.java 328ms 5.1ms 392.1MB 470ms 70ms openjdk 23
java 2.java 687ms 2.7ms 524.4MB 477ms 407ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 289ms 6.8ms 41.5MB 277ms 0ms nim 2.2.2
nim 1.nim 329ms 8.1ms 41.8MB 317ms 0ms nim/clang 2.2.2
java 1.java 431ms 12ms 115.9MB 483ms 23ms openjdk 21
java 1.java 477ms 33ms 118.4MB 523ms 27ms openjdk 23
java 1-m.java 620ms 8.0ms 218.4MB 897ms 63ms graal/jvm 17.0.8
java 1.java 625ms 9.3ms 112.7MB 537ms 163ms openjdk/zgc 21
java 2.java 782ms 2.9ms 56.8MB 840ms 17ms openjdk 21
java 2.java 801ms 16ms 60.2MB 853ms 20ms openjdk 23
java 2.java 850ms 3.1ms 53.3MB 780ms 147ms openjdk/zgc 21
java 2-m.java 1327ms 5.9ms 242.0MB 2380ms 100ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 53ms 2.7ms 11.5MB 40ms 0ms nim 2.2.2
nim 1.nim 56ms 3.9ms 11.8MB 43ms 0ms nim/clang 2.2.2
java 1.java 154ms 3.2ms 64.7MB 203ms 20ms openjdk 21
java 1.java 160ms 4.0ms 68.3MB 207ms 20ms openjdk 23
java 1-m.java 205ms 7.0ms 124.6MB 293ms 37ms graal/jvm 17.0.8
java 2.java 265ms 1.0ms 49.9MB 323ms 27ms openjdk 21
java 2.java 271ms 2.5ms 50.6MB 327ms 23ms openjdk 23
java 1.java 288ms 1.8ms 61.5MB 213ms 147ms openjdk/zgc 21
java 2.java 374ms 4.3ms 47.6MB 313ms 143ms openjdk/zgc 21
java 2-m.java 478ms 6.0ms 149.5MB 853ms 60ms graal/jvm 17.0.8

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1632ms 4.8ms 164.1MB 1603ms 20ms nim/clang 2.2.2
nim 1.nim 1698ms 8.9ms 163.9MB 1667ms 13ms nim 2.2.2
java 3.java timeout 0.0ms 398.2MB 5417ms 97ms graal/jvm 17.0.8
java 3.java timeout 0.0ms 302.2MB 5330ms 53ms openjdk 21
java 3.java timeout 0.0ms 304.6MB 5330ms 63ms openjdk 23
java 3.java timeout 0.0ms 466.7MB 4970ms 297ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 172ms 1.7ms 20.9MB 160ms 0ms nim/clang 2.2.2
nim 1.nim 178ms 1.9ms 20.6MB 163ms 0ms nim 2.2.2
java 3-m.java 780ms 24ms 175.7MB 1163ms 50ms graal/jvm 17.0.8
java 3-m.java 800ms 6.0ms 131.0MB 1180ms 30ms openjdk 21
java 3-m.java 844ms 52ms 132.6MB 1283ms 40ms openjdk 23
java 3.java 995ms 16ms 134.2MB 1203ms 190ms openjdk/zgc 21

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 1996ms 8.8ms 47.7MB 7623ms 27ms openjdk 21
java 2-m.java 2011ms 5.1ms 48.3MB 7643ms 27ms openjdk 23
java 2-m.java 2140ms 20ms 45.4MB 7653ms 150ms openjdk/zgc 21
java 2-m.java 2509ms 8.6ms 94.2MB 9357ms 43ms graal/jvm 17.0.8
nim 1.nim 3587ms 0.7ms 1.6MB 3580ms 0ms nim/clang 2.2.2
nim 1.nim 3592ms 2.0ms 1.4MB 3580ms 0ms nim 2.2.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 607ms 5.8ms 47.6MB 2140ms 23ms openjdk 21
java 2-m.java 621ms 7.5ms 48.9MB 2170ms 23ms openjdk 23
java 2-m.java 743ms 7.4ms 45.4MB 2183ms 143ms openjdk/zgc 21
java 2-m.java 769ms 3.8ms 95.1MB 2703ms 37ms graal/jvm 17.0.8
nim 1.nim 900ms 0.9ms 1.5MB 890ms 0ms nim/clang 2.2.2
nim 1.nim 902ms 2.5ms 1.3MB 890ms 0ms nim 2.2.2

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 227ms 0.4ms 1.5MB 220ms 0ms nim/clang 2.2.2
nim 1.nim 227ms 1.0ms 1.3MB 220ms 0ms nim 2.2.2
java 2-m.java 248ms 3.4ms 47.9MB 757ms 17ms openjdk 21
java 2-m.java 270ms 8.8ms 48.8MB 790ms 27ms openjdk 23
java 2-m.java 321ms 25ms 94.1MB 983ms 40ms graal/jvm 17.0.8
java 2-m.java 400ms 6.1ms 45.6MB 820ms 153ms openjdk/zgc 21