Programming Language and compiler
Benchmarks

Nim VS Javascript benchmarks

Current benchmark data was generated on Sun Jul 13 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
nim 2.nim 786ms 11ms 34.9MB 770ms 3ms nim 2.2.4
nim 2.nim 947ms 6.3ms 35.2MB 923ms 10ms nim/clang 2.2.4
javascript 1.js 1052ms 7.6ms 474.5MB 977ms 230ms node 24.4.0
javascript 1-m.js 1079ms 165ms 176.6MB 1527ms 260ms bun 1.2.18

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 73ms 0.2ms 5.5MB 60ms 0ms nim 2.2.4
nim 2.nim 93ms 1.5ms 5.8MB 80ms 0ms nim/clang 2.2.4
javascript 1.js 98ms 1.3ms 77.8MB 77ms 27ms bun 1.2.18
javascript 1.js 128ms 1.6ms 81.3MB 130ms 20ms node 24.4.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 1600ms 6.3ms 189.8MB 1570ms 100ms node 24.4.0
javascript 1.js 2457ms 68ms 101.6MB 2500ms 63ms bun 1.2.18
nim 1.nim timeout 0.0ms 574.4MB 2647ms 1873ms nim 2.2.4
nim 3.nim timeout 0.0ms 6.6MB 4990ms 0ms nim 2.2.4
nim 1.nim timeout 0.0ms 574.8MB 2590ms 1930ms nim/clang 2.2.4
nim 3.nim timeout 0.0ms 6.9MB 4983ms 0ms nim/clang 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1.js 157ms 1.8ms 75.4MB 143ms 23ms node 24.4.0
javascript 1.js 216ms 4.5ms 88.7MB 250ms 33ms bun 1.2.18
nim 3.nim 903ms 4.5ms 4.0MB 893ms 0ms nim/clang 2.2.4
nim 3.nim 905ms 4.9ms 3.6MB 893ms 0ms nim 2.2.4
nim 1.nim 4097ms 6.6ms 518.7MB 2123ms 1547ms nim/clang 2.2.4
nim 1.nim 4111ms 9.9ms 518.2MB 2133ms 1553ms nim 2.2.4

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 188ms 2.6ms 1.5MB 177ms 0ms nim 2.2.4
nim 2.nim 243ms 2.2ms 1.8MB 233ms 0ms nim/clang 2.2.4
nim 1.nim 537ms 2.6ms 1.8MB 447ms 73ms nim/clang 2.2.4
nim 1.nim 560ms 2.7ms 1.5MB 470ms 73ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 21ms 0.8ms 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 57ms 0.9ms 1.8MB 40ms 0ms nim/clang 2.2.4
nim 1.nim 59ms 0.7ms 1.5MB 47ms 0ms nim 2.2.4

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 1.8MB 0ms 0ms nim/clang 2.2.4
javascript 1.js 12ms 0.4ms 31.6MB 0ms 0ms bun 1.2.18
javascript 1.js 31ms 0.6ms 50.8MB 16ms 6ms node 24.4.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 112ms 1.7ms 1.6MB 103ms 0ms nim/clang 2.2.4
nim 2.nim 114ms 2.9ms 1.4MB 110ms 0ms nim 2.2.4
javascript 2.js 308ms 3.4ms 64.9MB 300ms 10ms node 24.4.0
javascript 1.js 572ms 4.7ms 63.7MB 557ms 10ms node 24.4.0
javascript 2.js 688ms 11ms 123.5MB 753ms 57ms bun 1.2.18
javascript 1.js 822ms 6.8ms 106.5MB 900ms 87ms bun 1.2.18
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 324ms 2.4ms 1.9MB 317ms 0ms nim/clang 2.2.4
nim 2.nim 338ms 4.4ms 1.4MB 330ms 0ms nim 2.2.4
javascript 2.js 837ms 7.0ms 71.6MB 820ms 17ms node 24.4.0
javascript 1.js 1623ms 6.8ms 70.0MB 1603ms 13ms node 24.4.0
javascript 2.js 1931ms 13ms 123.3MB 2110ms 67ms bun 1.2.18
javascript 1.js 2398ms 29ms 111.6MB 2653ms 207ms bun 1.2.18
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 48ms 0.2ms 1.5MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 51ms 1.6ms 1.3MB 40ms 0ms nim 2.2.4
javascript 2.js 163ms 0.9ms 59.3MB 157ms 10ms node 24.4.0
javascript 1.js 169ms 0.4ms 61.0MB 153ms 10ms node 24.4.0
javascript 1.js 317ms 1.9ms 130.9MB 350ms 73ms bun 1.2.18
javascript 2.js 372ms 1.1ms 125.8MB 400ms 50ms bun 1.2.18
nim 1.nim 476ms 2.4ms 1.3MB 467ms 0ms nim 2.2.4
nim 1.nim 479ms 9.7ms 1.5MB 470ms 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 0.9ms 4.8MB 380ms 0ms nim/clang 2.2.4
nim 1.nim 576ms 1.6ms 4.5MB 567ms 0ms nim 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 19ms 0.4ms 1.9MB 10ms 0ms nim/clang 2.2.4
nim 1.nim 27ms 0.2ms 1.6MB 20ms 0ms nim 2.2.4

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 1-m.js 468ms 20ms 136.0MB 607ms 117ms bun 1.2.18
nim 1.nim 547ms 6.1ms 33.9MB 527ms 3ms nim 2.2.4
javascript 1.js 563ms 3.7ms 230.8MB 563ms 117ms node 24.4.0
nim 1.nim 645ms 20ms 34.7MB 623ms 7ms nim/clang 2.2.4

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 116ms 3.2ms 9.6MB 103ms 0ms nim 2.2.4
javascript 1.js 117ms 2.5ms 85.9MB 103ms 30ms bun 1.2.18
nim 1.nim 136ms 5.6ms 9.9MB 123ms 0ms nim/clang 2.2.4
javascript 1.js 157ms 1.0ms 100.4MB 153ms 33ms node 24.4.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 320ms 1.7ms 1.8MB 310ms 0ms nim 2.2.4
nim 2.nim 343ms 3.6ms 2.0MB 337ms 0ms nim/clang 2.2.4
javascript 6.js 455ms 2.0ms 58.8MB 447ms 3ms node 24.4.0
javascript 6.js 607ms 14ms 44.8MB 610ms 0ms bun 1.2.18

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 35ms 0.8ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 36ms 0.6ms 2.0MB 30ms 0ms nim/clang 2.2.4
javascript 6.js 79ms 3.2ms 58.9MB 67ms 10ms node 24.4.0
javascript 6.js 80ms 1.8ms 44.9MB 83ms 7ms bun 1.2.18

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 271ms 4.0ms 41.5MB 263ms 0ms nim 2.2.4
nim 1.nim 322ms 6.8ms 41.8MB 313ms 0ms nim/clang 2.2.4

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 52ms 2.4ms 11.5MB 43ms 0ms nim 2.2.4
nim 1.nim 66ms 4.2ms 11.8MB 57ms 0ms nim/clang 2.2.4

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1646ms 10ms 152.3MB 1613ms 20ms nim/clang 2.2.4
nim 1.nim 1673ms 4.5ms 151.5MB 1643ms 13ms nim 2.2.4

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 173ms 2.5ms 17.5MB 160ms 0ms nim/clang 2.2.4
nim 1.nim 177ms 0.6ms 17.4MB 160ms 0ms nim 2.2.4

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 6-m.js 2178ms 17ms 118.9MB 8247ms 70ms node 24.4.0
nim 1.nim 3589ms 2.6ms 1.6MB 3580ms 0ms nim/clang 2.2.4
nim 1.nim 3610ms 3.4ms 1.4MB 3600ms 0ms nim 2.2.4

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
javascript 6-m.js 654ms 3.1ms 119.7MB 2343ms 57ms node 24.4.0
nim 1.nim 899ms 0.6ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 904ms 3.3ms 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 0.2ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 228ms 1.1ms 1.3MB 220ms 0ms nim 2.2.4
javascript 6-m.js 273ms 2.7ms 116.3MB 840ms 53ms node 24.4.0