Programming Language and compiler
Benchmarks

Nim VS Wasm benchmarks

Current benchmark data was generated on Sun Jun 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 779ms 1.2ms 34.4MB 760ms 3ms nim 2.2.4
nim 2.nim 963ms 9.3ms 35.2MB 940ms 10ms nim/clang 2.2.4
wasm 5.rs 1744ms 15ms 33.9MB 1727ms 10ms wasmtime 33.0.0
wasm 3.rs 1791ms 35ms 49.9MB 1760ms 13ms wasmtime 33.0.0
wasm 4.rs 1806ms 5.3ms 33.9MB 1783ms 10ms wasmtime 33.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 75ms 4.0ms 5.5MB 63ms 0ms nim 2.2.4
nim 2.nim 91ms 2.7ms 5.8MB 80ms 0ms nim/clang 2.2.4
wasm 5.rs 170ms 3.5ms 20.1MB 160ms 0ms wasmtime 33.0.0
wasm 3.rs 174ms 3.4ms 21.9MB 160ms 0ms wasmtime 33.0.0
wasm 4.rs 195ms 7.7ms 19.9MB 180ms 0ms wasmtime 33.0.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1143ms 6.3ms 20.3MB 1130ms 0ms wasmtime 33.0.0
nim 1.nim timeout 0.0ms 574.3MB 2627ms 1900ms nim 2.2.4
nim 1.nim timeout 0.0ms 574.8MB 2630ms 1897ms nim/clang 2.2.4

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 81ms 1.2ms 18.6MB 70ms 0ms wasmtime 33.0.0
nim 1.nim 4103ms 11ms 519.8MB 2090ms 1590ms nim/clang 2.2.4
nim 1.nim 4106ms 11ms 519.3MB 2163ms 1517ms nim 2.2.4

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 189ms 1.2ms 1.5MB 180ms 0ms nim 2.2.4
wasm 1.rs 232ms 1.5ms 18.0MB 217ms 0ms wasmtime 33.0.0
nim 2.nim 241ms 2.6ms 1.8MB 230ms 0ms nim/clang 2.2.4
nim 1.nim 535ms 1.0ms 1.8MB 430ms 90ms nim/clang 2.2.4
nim 1.nim 558ms 2.5ms 1.5MB 473ms 67ms nim 2.2.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 22ms 0.1ms 1.5MB 13ms 0ms nim 2.2.4
nim 2.nim 27ms 1.0ms 1.8MB 20ms 0ms nim/clang 2.2.4
wasm 1.rs 31ms 0.6ms 18.0MB 20ms 0ms wasmtime 33.0.0
nim 1.nim 57ms 0.5ms 1.8MB 40ms 3ms nim/clang 2.2.4
nim 1.nim 57ms 0.2ms 1.5MB 40ms 3ms nim 2.2.4

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 0.9ms 0.0ms 1.5MB 0ms 0ms nim 2.2.4
nim 1.nim 1.1ms 0.0ms 1.9MB 0ms 0ms nim/clang 2.2.4
wasm 1.rs 6.2ms 0.3ms 15.3MB 0ms 0ms wasmtime 33.0.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 91ms 1.0ms 17.7MB 80ms 0ms wasmtime 33.0.0
nim 2.nim 111ms 2.3ms 1.6MB 100ms 0ms nim/clang 2.2.4
nim 2.nim 114ms 1.7ms 1.4MB 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 2.5ms 17.6MB 240ms 0ms wasmtime 33.0.0
nim 2.nim 328ms 1.4ms 1.6MB 320ms 0ms nim/clang 2.2.4
nim 2.nim 333ms 1.4ms 1.4MB 323ms 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 0.4ms 17.5MB 37ms 0ms wasmtime 33.0.0
nim 2.nim 48ms 0.6ms 1.5MB 40ms 0ms nim/clang 2.2.4
nim 2.nim 51ms 0.8ms 1.3MB 40ms 0ms nim 2.2.4
nim 1.nim 476ms 7.0ms 1.5MB 467ms 0ms nim/clang 2.2.4
nim 1.nim 480ms 4.8ms 1.3MB 473ms 0ms nim 2.2.4

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 389ms 1.0ms 4.8MB 380ms 0ms nim/clang 2.2.4
nim 1.nim 578ms 2.7ms 4.5MB 567ms 0ms nim 2.2.4
wasm 8.rs 832ms 3.3ms 21.1MB 817ms 0ms wasmtime 33.0.0

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 2.2.4
nim 1.nim 26ms 0.6ms 1.6MB 20ms 0ms nim 2.2.4
wasm 8.rs 43ms 1.0ms 18.2MB 30ms 0ms wasmtime 33.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 546ms 4.1ms 33.9MB 530ms 3ms nim 2.2.4
nim 1.nim 627ms 11ms 35.2MB 607ms 10ms nim/clang 2.2.4
wasm 1.rs 869ms 4.9ms 41.9MB 847ms 10ms wasmtime 33.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 119ms 2.2ms 9.6MB 110ms 0ms nim 2.2.4
nim 1.nim 137ms 5.9ms 9.9MB 123ms 0ms nim/clang 2.2.4
wasm 1.rs 193ms 3.5ms 26.0MB 177ms 0ms wasmtime 33.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 318ms 0.5ms 1.8MB 310ms 0ms nim 2.2.4
nim 2.nim 344ms 2.8ms 2.0MB 337ms 0ms nim/clang 2.2.4
wasm 1.rs 404ms 2.3ms 18.1MB 390ms 0ms wasmtime 33.0.0
wasm 2.rs 565ms 4.4ms 18.1MB 547ms 0ms wasmtime 33.0.0

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 2.2.4
nim 2.nim 37ms 1.1ms 2.0MB 30ms 0ms nim/clang 2.2.4
wasm 1.rs 48ms 1.3ms 18.1MB 37ms 0ms wasmtime 33.0.0
wasm 2.rs 64ms 1.1ms 18.4MB 50ms 0ms wasmtime 33.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 264ms 6.1ms 41.5MB 250ms 0ms nim 2.2.4
nim 1.nim 316ms 7.7ms 41.8MB 300ms 0ms nim/clang 2.2.4
wasm 2.rs 373ms 4.4ms 22.9MB 357ms 0ms wasmtime 33.0.0
wasm 1.rs 454ms 1.1ms 57.0MB 440ms 0ms wasmtime 33.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 52ms 2.1ms 11.5MB 47ms 0ms nim 2.2.4
nim 1.nim 63ms 5.6ms 11.8MB 53ms 0ms nim/clang 2.2.4
wasm 1.rs 94ms 1.3ms 27.7MB 80ms 0ms wasmtime 33.0.0
wasm 2.rs 95ms 0.6ms 19.2MB 80ms 0ms wasmtime 33.0.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1643ms 3.6ms 152.4MB 1610ms 20ms nim/clang 2.2.4
nim 1.nim 1672ms 3.8ms 152.1MB 1640ms 20ms nim 2.2.4

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 174ms 2.8ms 16.8MB 160ms 0ms nim/clang 2.2.4
nim 1.nim 176ms 2.8ms 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
nim 1.nim 3587ms 1.2ms 1.6MB 3580ms 0ms nim/clang 2.2.4
wasm 2.rs 3597ms 4.4ms 17.7MB 3583ms 0ms wasmtime 33.0.0
nim 1.nim 3604ms 3.0ms 1.8MB 3593ms 0ms nim 2.2.4
wasm 7.rs 4900ms 7.4ms 17.7MB 4887ms 0ms wasmtime 33.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 898ms 0.5ms 1.5MB 890ms 0ms nim/clang 2.2.4
nim 1.nim 903ms 2.7ms 1.3MB 893ms 0ms nim 2.2.4
wasm 2.rs 905ms 1.7ms 18.2MB 890ms 0ms wasmtime 33.0.0
wasm 7.rs 1229ms 2.0ms 17.7MB 1217ms 0ms wasmtime 33.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 226ms 0.4ms 1.5MB 220ms 0ms nim/clang 2.2.4
nim 1.nim 229ms 1.5ms 1.3MB 220ms 0ms nim 2.2.4
wasm 2.rs 233ms 1.4ms 18.3MB 220ms 0ms wasmtime 33.0.0
wasm 7.rs 315ms 1.6ms 17.7MB 300ms 0ms wasmtime 33.0.0