Programming Language and compiler
Benchmarks

Wasm VS Nim 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.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 819ms 29ms 34.4MB 800ms 0ms nim 2.2.4
nim 2.nim 968ms 6.2ms 35.2MB 950ms 3ms nim/clang 2.2.4
wasm 5.rs 1766ms 30ms 36.0MB 1747ms 7ms wasmtime 34.0.1
wasm 4.rs 1838ms 15ms 34.0MB 1817ms 10ms wasmtime 34.0.1
wasm 3.rs 1880ms 33ms 50.0MB 1850ms 13ms wasmtime 34.0.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 77ms 2.5ms 5.5MB 70ms 0ms nim 2.2.4
nim 2.nim 93ms 2.5ms 5.8MB 80ms 0ms nim/clang 2.2.4
wasm 5.rs 167ms 1.1ms 20.1MB 150ms 0ms wasmtime 34.0.1
wasm 4.rs 174ms 1.7ms 20.0MB 160ms 3ms wasmtime 34.0.1
wasm 3.rs 179ms 2.1ms 22.1MB 163ms 0ms wasmtime 34.0.1

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1111ms 16ms 20.4MB 1100ms 0ms wasmtime 34.0.1
nim 1.nim timeout 0.0ms 572.1MB 2667ms 1857ms nim 2.2.4
nim 1.nim timeout 0.0ms 574.6MB 2610ms 1913ms nim/clang 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 77ms 0.4ms 19.1MB 67ms 0ms wasmtime 34.0.1
nim 1.nim 4108ms 3.9ms 518.6MB 2127ms 1553ms nim/clang 2.2.4
nim 1.nim 4147ms 34ms 519.4MB 2150ms 1567ms nim 2.2.4

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 419ms 6.5ms 19.5MB 403ms 0ms wasmtime 34.0.1

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 113ms 0.1ms 19.0MB 100ms 0ms wasmtime 34.0.1

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 4201ms 47ms 18.3MB 4190ms 0ms wasmtime 34.0.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 349ms 0.3ms 18.3MB 337ms 0ms wasmtime 34.0.1

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 189ms 1.3ms 1.5MB 180ms 0ms nim 2.2.4
wasm 1.rs 235ms 3.7ms 18.2MB 220ms 0ms wasmtime 34.0.1
nim 2.nim 242ms 1.4ms 1.8MB 230ms 0ms nim/clang 2.2.4
nim 1.nim 539ms 0.9ms 1.8MB 447ms 80ms nim/clang 2.2.4
nim 1.nim 562ms 2.0ms 1.5MB 467ms 77ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 21ms 1.0ms 1.5MB 10ms 0ms nim 2.2.4
nim 2.nim 26ms 0.3ms 1.6MB 20ms 0ms nim/clang 2.2.4
wasm 1.rs 32ms 1.2ms 18.2MB 20ms 0ms wasmtime 34.0.1
nim 1.nim 56ms 0.7ms 1.9MB 40ms 7ms nim/clang 2.2.4
nim 1.nim 58ms 0.5ms 1.5MB 43ms 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 1.5MB 0ms 0ms nim 2.2.4
nim 1.nim 1.1ms 0.0ms 1.8MB 0ms 0ms nim/clang 2.2.4
wasm 1.rs 6.7ms 0.5ms 18.3MB 0ms 0ms wasmtime 34.0.1

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 90ms 1.3ms 18.5MB 80ms 0ms wasmtime 34.0.1
nim 2.nim 111ms 2.3ms 1.9MB 103ms 0ms nim/clang 2.2.4
nim 2.nim 114ms 1.1ms 1.6MB 110ms 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
wasm 1.rs 253ms 2.7ms 17.9MB 240ms 0ms wasmtime 34.0.1
nim 2.nim 326ms 1.8ms 1.6MB 317ms 0ms nim/clang 2.2.4
nim 2.nim 335ms 2.3ms 1.6MB 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
wasm 1.rs 47ms 1.0ms 17.7MB 33ms 0ms wasmtime 34.0.1
nim 2.nim 49ms 0.7ms 1.5MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 51ms 2.1ms 1.5MB 43ms 0ms nim 2.2.4
nim 1.nim 477ms 2.9ms 1.3MB 470ms 0ms nim 2.2.4
nim 1.nim 486ms 13ms 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 1.2ms 4.8MB 380ms 0ms nim/clang 2.2.4
nim 1.nim 578ms 3.9ms 4.5MB 567ms 0ms nim 2.2.4
wasm 8.rs 828ms 2.0ms 21.5MB 817ms 0ms wasmtime 34.0.1

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 26ms 0.6ms 1.6MB 20ms 0ms nim 2.2.4
wasm 8.rs 43ms 0.2ms 18.4MB 30ms 0ms wasmtime 34.0.1

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 550ms 7.5ms 34.9MB 533ms 7ms nim 2.2.4
nim 1.nim 626ms 13ms 35.2MB 607ms 3ms nim/clang 2.2.4
wasm 1.rs 886ms 12ms 44.1MB 863ms 10ms wasmtime 34.0.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 117ms 1.4ms 9.6MB 107ms 0ms nim 2.2.4
nim 1.nim 133ms 1.2ms 9.9MB 120ms 0ms nim/clang 2.2.4
wasm 1.rs 193ms 1.1ms 24.1MB 177ms 3ms wasmtime 34.0.1

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 319ms 1.6ms 1.8MB 310ms 0ms nim 2.2.4
nim 2.nim 341ms 1.3ms 2.0MB 330ms 0ms nim/clang 2.2.4
wasm 1.rs 404ms 3.4ms 18.0MB 390ms 0ms wasmtime 34.0.1
wasm 2.rs 562ms 0.4ms 18.3MB 550ms 0ms wasmtime 34.0.1

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 35ms 0.5ms 1.8MB 30ms 0ms nim 2.2.4
nim 2.nim 37ms 0.7ms 2.0MB 30ms 0ms nim/clang 2.2.4
wasm 1.rs 49ms 1.1ms 18.1MB 37ms 0ms wasmtime 34.0.1
wasm 2.rs 65ms 1.1ms 18.1MB 50ms 0ms wasmtime 34.0.1

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 281ms 9.2ms 41.5MB 270ms 0ms nim 2.2.4
nim 1.nim 314ms 3.5ms 41.8MB 303ms 0ms nim/clang 2.2.4
wasm 2.rs 391ms 3.6ms 23.0MB 377ms 0ms wasmtime 34.0.1
wasm 1.rs 526ms 14ms 57.2MB 510ms 0ms wasmtime 34.0.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 51ms 1.7ms 11.5MB 40ms 0ms nim 2.2.4
nim 1.nim 64ms 3.6ms 11.8MB 53ms 0ms nim/clang 2.2.4
wasm 1.rs 94ms 2.6ms 27.8MB 80ms 0ms wasmtime 34.0.1
wasm 2.rs 100ms 2.9ms 19.5MB 90ms 0ms wasmtime 34.0.1

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 2137ms 4.5ms 19.2MB 2123ms 0ms wasmtime 34.0.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 509ms 3.9ms 18.3MB 493ms 0ms wasmtime 34.0.1

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3428ms 13ms 17.9MB 3413ms 0ms wasmtime 34.0.1

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 880ms 8.0ms 18.5MB 867ms 0ms wasmtime 34.0.1

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 3588ms 2.7ms 1.6MB 3580ms 0ms nim/clang 2.2.4
wasm 2.rs 3600ms 5.7ms 18.3MB 3587ms 0ms wasmtime 34.0.1
nim 1.nim 3609ms 14ms 1.4MB 3603ms 0ms nim 2.2.4
wasm 7.rs 4895ms 4.2ms 18.3MB 4883ms 0ms wasmtime 34.0.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 899ms 0.7ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 904ms 2.9ms 1.3MB 893ms 0ms nim 2.2.4
wasm 2.rs 907ms 0.5ms 17.7MB 893ms 0ms wasmtime 34.0.1
wasm 7.rs 1230ms 1.2ms 17.7MB 1220ms 0ms wasmtime 34.0.1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 226ms 0.3ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 229ms 0.9ms 1.3MB 220ms 0ms nim 2.2.4
wasm 2.rs 234ms 1.4ms 17.6MB 220ms 0ms wasmtime 34.0.1
wasm 7.rs 316ms 0.4ms 18.1MB 303ms 0ms wasmtime 34.0.1