Programming Language and compiler
Benchmarks

Nim VS Java benchmarks

Current benchmark data was generated on Mon May 19 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 6.7ms 574.1MB 563ms 77ms openjdk 21
java 2-m.java 466ms 7.3ms 643.0MB 657ms 117ms graal/jvm 17.0.8
java 2.java 468ms 2.3ms 638.7MB 577ms 87ms openjdk 23
nim 2.nim 836ms 40ms 34.9MB 817ms 7ms nim 2.2.4
nim 2.nim 971ms 5.9ms 35.2MB 953ms 3ms nim/clang 2.2.4
java 2.java 1195ms 46ms 1101.7MB 577ms 787ms openjdk/zgc 21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 77ms 1.2ms 5.5MB 70ms 0ms nim 2.2.4
nim 2.nim 93ms 2.7ms 5.8MB 80ms 0ms nim/clang 2.2.4
java 2.java 128ms 1.6ms 167.0MB 157ms 33ms openjdk 21
java 2.java 133ms 5.7ms 96.5MB 163ms 30ms openjdk 23
java 2-m.java 152ms 7.0ms 215.4MB 227ms 57ms graal/jvm 17.0.8
java 2.java 308ms 9.8ms 241.5MB 170ms 193ms 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 2237ms 158ms 258.9MB 8497ms 143ms openjdk 21
java 1-m.java 2494ms 200ms 242.9MB 9503ms 130ms openjdk 23
java 1-m.java 2940ms 99ms 1203.7MB 9563ms 1067ms openjdk/zgc 21
nim 1.nim timeout 0.0ms 575.4MB 2623ms 1900ms nim 2.2.4
nim 1.nim timeout 0.0ms 575.7MB 2560ms 1967ms nim/clang 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 467ms 39ms 121.7MB 1563ms 73ms openjdk 21
java 1-m.java 480ms 45ms 94.9MB 1580ms 57ms openjdk 23
java 1-m.java 668ms 8.4ms 212.9MB 1767ms 267ms openjdk/zgc 21
nim 1.nim 4094ms 5.6ms 519.3MB 2117ms 1553ms nim 2.2.4
nim 1.nim 4109ms 27ms 518.7MB 2100ms 1580ms nim/clang 2.2.4

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 188ms 2.8ms 1.5MB 180ms 0ms nim 2.2.4
nim 2.nim 243ms 2.1ms 1.8MB 230ms 0ms nim/clang 2.2.4
java 4.java 447ms 1.7ms 100.5MB 630ms 40ms graal/jvm 17.0.8
java 4.java 454ms 3.1ms 47.5MB 533ms 20ms openjdk 21
java 4.java 471ms 9.6ms 49.1MB 567ms 23ms openjdk 23
nim 1.nim 533ms 0.9ms 1.8MB 453ms 67ms nim/clang 2.2.4
nim 1.nim 557ms 2.9ms 1.5MB 470ms 73ms nim 2.2.4
java 4.java 572ms 6.6ms 45.1MB 543ms 137ms openjdk/zgc 21

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 22ms 0.7ms 1.5MB 10ms 0ms nim 2.2.4
nim 2.nim 27ms 1.0ms 1.8MB 20ms 0ms nim/clang 2.2.4
nim 1.nim 56ms 0.8ms 1.8MB 43ms 0ms nim/clang 2.2.4
nim 1.nim 59ms 1.8ms 1.5MB 40ms 3ms nim 2.2.4
java 4.java 122ms 6.1ms 46.5MB 160ms 17ms openjdk 21
java 4-m.java 130ms 1.9ms 47.6MB 180ms 17ms openjdk 23
java 4-m.java 133ms 5.7ms 94.2MB 190ms 33ms graal/jvm 17.0.8
java 4.java 250ms 3.4ms 44.0MB 170ms 140ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.0ms 0.0ms 1.6MB 0ms 0ms nim 2.2.4
nim 1.nim 1.1ms 0.0ms 1.9MB 0ms 0ms nim/clang 2.2.4
java 1.java 65ms 2.3ms 53.1MB 68ms 20ms graal/jvm 17.0.8
java 1.java 70ms 6.5ms 44.7MB 80ms 14ms openjdk 23
java 1.java 70ms 4.4ms 43.9MB 76ms 18ms openjdk 21
java 1.java 194ms 7.5ms 43.0MB 86ms 142ms 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 1.5ms 1.6MB 100ms 0ms nim/clang 2.2.4
nim 2.nim 114ms 1.4ms 1.4MB 107ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 325ms 2.6ms 1.6MB 317ms 0ms nim/clang 2.2.4
nim 2.nim 336ms 4.1ms 1.4MB 327ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 50ms 1.8ms 1.5MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 52ms 1.0ms 1.3MB 43ms 0ms nim 2.2.4
nim 1.nim 482ms 4.8ms 1.3MB 477ms 0ms nim 2.2.4
nim 1.nim 488ms 14ms 1.5MB 477ms 0ms nim/clang 2.2.4

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 387ms 0.4ms 4.8MB 380ms 0ms nim/clang 2.2.4
nim 1.nim 576ms 1.5ms 4.5MB 563ms 0ms nim 2.2.4
java 1b.java 1150ms 9.6ms 55.1MB 1253ms 17ms openjdk 23
java 1b.java 1165ms 24ms 54.5MB 1277ms 20ms openjdk 21
java 1b.java 1185ms 21ms 110.0MB 1397ms 40ms graal/jvm 17.0.8
java 1.java 1259ms 14ms 133.7MB 1377ms 50ms graal/jvm 17.0.8
java 1b.java 1282ms 17ms 51.0MB 1270ms 143ms openjdk/zgc 21
java 1a.java 1658ms 5.0ms 55.8MB 1757ms 27ms openjdk 23
java 1a.java 1665ms 7.5ms 55.0MB 1773ms 17ms openjdk 21
java 1a.java 1696ms 7.7ms 102.1MB 1813ms 43ms graal/jvm 17.0.8
java 1.java 1710ms 5.3ms 266.5MB 1773ms 47ms openjdk 21
java 1.java 1716ms 3.0ms 317.2MB 1780ms 53ms openjdk 23
java 1a.java 1786ms 3.6ms 52.1MB 1770ms 140ms openjdk/zgc 21
java 1.java 2371ms 11ms 852.6MB 1813ms 670ms openjdk/zgc 21
java 2.java timeout 0.0ms 707.1MB 5343ms 120ms openjdk 21
java 2.java timeout 0.0ms 756.4MB 5333ms 133ms openjdk 23
java 2.java timeout 0.0ms 3298.5MB 3430ms 1950ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 19ms 0.5ms 1.9MB 10ms 0ms nim/clang 2.2.4
nim 1.nim 27ms 1.2ms 1.6MB 20ms 0ms nim 2.2.4
java 1b-m.java 183ms 6.1ms 49.6MB 290ms 27ms openjdk 21
java 1b-m.java 186ms 5.5ms 51.5MB 297ms 20ms openjdk 23
java 1a-m.java 191ms 4.9ms 50.8MB 290ms 23ms openjdk 21
java 1a-m.java 193ms 3.0ms 52.9MB 290ms 23ms openjdk 23
java 1-m.java 197ms 3.9ms 87.1MB 273ms 30ms openjdk 23
java 1-m.java 198ms 3.0ms 81.7MB 280ms 23ms openjdk 21
java 1-m.java 201ms 9.5ms 112.5MB 310ms 43ms graal/jvm 17.0.8
java 1a-m.java 208ms 1.3ms 98.4MB 320ms 33ms graal/jvm 17.0.8
java 1b-m.java 226ms 12ms 100.1MB 390ms 37ms graal/jvm 17.0.8
java 1b.java 307ms 6.4ms 47.4MB 300ms 140ms openjdk/zgc 21
java 1a.java 319ms 1.1ms 48.9MB 300ms 147ms openjdk/zgc 21
java 1.java 337ms 3.1ms 114.3MB 260ms 163ms openjdk/zgc 21
java 2-m.java 560ms 7.9ms 661.3MB 860ms 100ms openjdk 21
java 2-m.java 587ms 3.2ms 785.9MB 887ms 97ms openjdk 23
java 2.java 1620ms 55ms 1396.0MB 853ms 1077ms openjdk/zgc 21

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 404ms 4.9ms 534.3MB 500ms 93ms openjdk 23
java 1.java 406ms 4.3ms 679.8MB 490ms 90ms openjdk 21
java 1-m.java 408ms 8.7ms 626.3MB 617ms 97ms graal/jvm 17.0.8
nim 1.nim 552ms 1.9ms 34.9MB 530ms 7ms nim 2.2.4
nim 1.nim 634ms 34ms 35.2MB 613ms 10ms nim/clang 2.2.4
java 1.java 1026ms 1.9ms 933.9MB 487ms 690ms openjdk/zgc 21

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 120ms 2.4ms 9.6MB 110ms 0ms nim 2.2.4
nim 1.nim 135ms 2.2ms 9.9MB 123ms 0ms nim/clang 2.2.4
java 1-m.java 167ms 1.6ms 206.1MB 240ms 43ms openjdk 21
java 1-m.java 168ms 1.1ms 158.3MB 247ms 40ms openjdk 23
java 1-m.java 216ms 12ms 253.2MB 367ms 60ms graal/jvm 17.0.8
java 1.java 419ms 8.2ms 341.9MB 217ms 280ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 319ms 1.7ms 1.8MB 310ms 0ms nim 2.2.4
nim 2.nim 340ms 0.5ms 2.0MB 330ms 0ms nim/clang 2.2.4
java 1.java 445ms 0.4ms 45.0MB 490ms 13ms openjdk 21
java 1.java 446ms 3.8ms 48.4MB 477ms 20ms openjdk 23
java 1.java 447ms 2.3ms 82.2MB 477ms 27ms graal/jvm 17.0.8
java 1.java 577ms 2.1ms 44.8MB 497ms 140ms openjdk/zgc 21
java 2.java 1252ms 5.6ms 639.9MB 1390ms 87ms openjdk 21
java 2.java 1277ms 19ms 794.0MB 1390ms 113ms openjdk 23
java 2.java 3274ms 53ms 2445.6MB 1653ms 1830ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 35ms 1.0ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 40ms 6.2ms 2.0MB 33ms 0ms nim/clang 2.2.4
java 1.java 120ms 4.0ms 48.0MB 153ms 20ms openjdk 23
java 1.java 122ms 2.1ms 44.9MB 167ms 13ms openjdk 21
java 1-m.java 123ms 4.2ms 81.5MB 157ms 33ms graal/jvm 17.0.8
java 1.java 249ms 3.8ms 44.9MB 157ms 147ms openjdk/zgc 21
java 2-m.java 302ms 22ms 344.8MB 437ms 53ms openjdk 21
java 2-m.java 313ms 7.2ms 400.0MB 443ms 70ms openjdk 23
java 2.java 684ms 17ms 532.7MB 467ms 407ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 267ms 0.8ms 41.5MB 253ms 0ms nim 2.2.4
nim 1.nim 314ms 3.5ms 41.8MB 303ms 0ms nim/clang 2.2.4
java 1.java 410ms 3.5ms 115.8MB 463ms 27ms openjdk 21
java 1.java 424ms 3.9ms 118.5MB 467ms 27ms openjdk 23
java 1.java 587ms 6.0ms 112.8MB 493ms 163ms openjdk/zgc 21
java 1-m.java 644ms 25ms 236.7MB 933ms 77ms graal/jvm 17.0.8
java 2.java 782ms 3.1ms 56.9MB 837ms 17ms openjdk 21
java 2.java 786ms 9.6ms 60.5MB 840ms 20ms openjdk 23
java 2.java 847ms 3.9ms 53.2MB 777ms 143ms openjdk/zgc 21
java 2-m.java 1339ms 8.3ms 234.5MB 2410ms 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 51ms 1.1ms 11.6MB 40ms 0ms nim 2.2.4
nim 1.nim 63ms 1.6ms 11.8MB 53ms 0ms nim/clang 2.2.4
java 1.java 155ms 2.3ms 68.1MB 200ms 23ms openjdk 23
java 1.java 158ms 3.5ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 210ms 6.9ms 124.8MB 297ms 47ms graal/jvm 17.0.8
java 2.java 262ms 3.1ms 50.5MB 310ms 23ms openjdk 23
java 2.java 263ms 1.2ms 50.0MB 327ms 20ms openjdk 21
java 1.java 286ms 4.1ms 61.5MB 203ms 150ms openjdk/zgc 21
java 2.java 370ms 2.8ms 47.7MB 303ms 147ms openjdk/zgc 21
java 2-m.java 470ms 6.2ms 199.2MB 830ms 63ms 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 1651ms 5.5ms 151.9MB 1620ms 13ms nim/clang 2.2.4
nim 1.nim 1683ms 16ms 152.1MB 1650ms 20ms nim 2.2.4
java 3.java timeout 0.0ms 399.2MB 5400ms 90ms graal/jvm 17.0.8
java 3.java timeout 0.0ms 302.2MB 5327ms 60ms openjdk 21
java 3.java timeout 0.0ms 305.0MB 5323ms 63ms openjdk 23
java 3.java timeout 0.0ms 468.6MB 4970ms 293ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 174ms 3.4ms 17.6MB 160ms 0ms nim/clang 2.2.4
nim 1.nim 176ms 3.6ms 17.2MB 163ms 0ms nim 2.2.4
java 3-m.java 772ms 8.0ms 176.1MB 1150ms 57ms graal/jvm 17.0.8
java 3-m.java 798ms 9.3ms 128.8MB 1187ms 37ms openjdk 21
java 3-m.java 805ms 18ms 132.4MB 1233ms 43ms openjdk 23
java 3.java 985ms 10ms 133.8MB 1160ms 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 1987ms 7.3ms 47.4MB 7587ms 27ms openjdk 21
java 2-m.java 2001ms 11ms 48.8MB 7653ms 27ms openjdk 23
java 2-m.java 2120ms 12ms 45.2MB 7633ms 150ms openjdk/zgc 21
java 2-m.java 2521ms 48ms 94.9MB 9407ms 50ms graal/jvm 17.0.8
nim 1.nim 3587ms 2.7ms 1.6MB 3580ms 0ms nim/clang 2.2.4
nim 1.nim 3610ms 12ms 1.4MB 3597ms 0ms nim 2.2.4

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 605ms 4.2ms 47.7MB 2140ms 20ms openjdk 21
java 2-m.java 617ms 2.8ms 48.8MB 2187ms 20ms openjdk 23
java 2-m.java 732ms 8.1ms 45.3MB 2153ms 147ms openjdk/zgc 21
java 2-m.java 776ms 4.7ms 95.1MB 2737ms 43ms graal/jvm 17.0.8
nim 1.nim 899ms 0.8ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 902ms 1.4ms 1.3MB 893ms 0ms nim 2.2.4

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 226ms 0.1ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 229ms 1.9ms 1.3MB 220ms 0ms nim 2.2.4
java 2-m.java 248ms 5.2ms 47.7MB 723ms 20ms openjdk 21
java 2-m.java 267ms 4.0ms 48.4MB 787ms 20ms openjdk 23
java 2-m.java 323ms 9.1ms 94.0MB 987ms 43ms graal/jvm 17.0.8
java 2-m.java 387ms 8.0ms 45.5MB 783ms 147ms openjdk/zgc 21