Programming Language and compiler
Benchmarks

Wasm VS Rust 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
rust 4.rs 1281ms 13ms 33.8MB 1260ms 7ms rustc 1.87.0
rust 5.rs 1340ms 6.3ms 33.8MB 1317ms 10ms rustc 1.87.0
rust 3.rs 1496ms 49ms 49.8MB 1463ms 17ms rustc 1.87.0
wasm 4.rs 1799ms 13ms 33.8MB 1780ms 10ms wasmtime 32.0.0
wasm 5.rs 1807ms 26ms 33.8MB 1787ms 3ms wasmtime 32.0.0
wasm 3.rs 1837ms 50ms 49.8MB 1807ms 17ms wasmtime 32.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 118ms 0.3ms 5.6MB 110ms 0ms rustc 1.87.0
rust 5.rs 128ms 5.4ms 5.8MB 117ms 0ms rustc 1.87.0
rust 3.rs 142ms 6.5ms 7.8MB 130ms 0ms rustc 1.87.0
wasm 5.rs 170ms 0.4ms 19.8MB 157ms 0ms wasmtime 32.0.0
wasm 3.rs 172ms 3.8ms 21.7MB 160ms 0ms wasmtime 32.0.0
wasm 4.rs 172ms 1.7ms 19.7MB 160ms 0ms wasmtime 32.0.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-m.rs 518ms 38ms 9.1MB 1957ms 60ms rustc 1.87.0
rust 5-m.rs 679ms 12ms 5.5MB 2580ms 67ms rustc 1.87.0
rust 1-m.rs 955ms 8.3ms 7.4MB 3497ms 227ms rustc 1.87.0
rust 3.rs 1110ms 9.5ms 9.3MB 1070ms 23ms rustc 1.87.0
wasm 3.rs 1141ms 15ms 20.2MB 1127ms 0ms wasmtime 32.0.0
rust 4.rs 1921ms 31ms 6.9MB 1903ms 0ms rustc 1.87.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-m.rs 51ms 1.1ms 3.3MB 153ms 10ms rustc 1.87.0
rust 3-m.rs 55ms 3.2ms 4.1MB 173ms 10ms rustc 1.87.0
rust 3.rs 69ms 0.8ms 4.0MB 60ms 0ms rustc 1.87.0
rust 1-m.rs 73ms 0.3ms 3.5MB 237ms 17ms rustc 1.87.0
wasm 3.rs 83ms 1.7ms 18.3MB 70ms 0ms wasmtime 32.0.0
rust 4.rs 115ms 1.2ms 3.1MB 107ms 0ms rustc 1.87.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 124ms 1.5ms 3.6MB 120ms 0ms rustc 1.87.0
wasm 1.rs 420ms 2.0ms 19.4MB 407ms 0ms wasmtime 32.0.0
rust 2.rs 421ms 2.7ms 3.6MB 410ms 0ms rustc 1.87.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 33ms 0.7ms 2.9MB 23ms 0ms rustc 1.87.0
rust 2.rs 77ms 2.2ms 3.0MB 70ms 0ms rustc 1.87.0
wasm 1.rs 114ms 1.7ms 19.0MB 100ms 0ms wasmtime 32.0.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 410ms 1.7ms 2.1MB 1587ms 0ms rustc 1.87.0
rust 5-m.rs 554ms 1.8ms 2.1MB 2130ms 0ms rustc 1.87.0
rust 2-im.rs 677ms 6.8ms 2.1MB 2577ms 0ms rustc 1.87.0
rust 1-m.rs 937ms 1.3ms 2.1MB 3610ms 0ms rustc 1.87.0
rust 3-i.rs 1497ms 1.4ms 1.9MB 1490ms 0ms rustc 1.87.0
rust 2-i.rs 2404ms 0.4ms 1.8MB 2397ms 0ms rustc 1.87.0
rust 1.rs 2718ms 7.7ms 1.8MB 2710ms 0ms rustc 1.87.0
wasm 1.rs 4187ms 38ms 17.3MB 4177ms 0ms wasmtime 32.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 38ms 0.2ms 2.0MB 120ms 0ms rustc 1.87.0
rust 5-m.rs 52ms 0.4ms 2.0MB 170ms 0ms rustc 1.87.0
rust 2-im.rs 61ms 2.2ms 2.0MB 200ms 0ms rustc 1.87.0
rust 1-m.rs 83ms 0.6ms 2.0MB 290ms 0ms rustc 1.87.0
rust 3-i.rs 125ms 0.5ms 1.9MB 120ms 0ms rustc 1.87.0
rust 2-i.rs 197ms 0.2ms 1.8MB 190ms 0ms rustc 1.87.0
rust 1.rs 223ms 0.9ms 1.8MB 213ms 0ms rustc 1.87.0
wasm 1.rs 350ms 1.9ms 19.2MB 340ms 0ms wasmtime 32.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 6.rs 88ms 2.2ms 1.9MB 80ms 0ms rustc 1.87.0
rust 5c-m.rs 88ms 0.3ms 3.4MB 240ms 0ms rustc 1.87.0
rust 5-m.rs 94ms 0.1ms 3.2MB 290ms 3ms rustc 1.87.0
rust 1c.rs 163ms 0.5ms 1.9MB 150ms 0ms rustc 1.87.0
rust 1.rs 194ms 0.9ms 2.0MB 183ms 0ms rustc 1.87.0
wasm 1.rs 234ms 2.0ms 17.9MB 220ms 0ms wasmtime 32.0.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 6.rs 11ms 0.1ms 1.9MB 0ms 0ms rustc 1.87.0
rust 5c-m.rs 15ms 0.3ms 3.2MB 20ms 0ms rustc 1.87.0
rust 5-m.rs 16ms 0.6ms 3.2MB 30ms 0ms rustc 1.87.0
rust 1c.rs 19ms 0.4ms 1.9MB 10ms 0ms rustc 1.87.0
rust 1.rs 21ms 0.3ms 1.9MB 10ms 0ms rustc 1.87.0
wasm 1.rs 31ms 0.9ms 17.8MB 20ms 0ms wasmtime 32.0.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1.2ms 0.0ms 1.8MB 0ms 0ms rustc 1.87.0
rust 1.rs 1.7ms 0.6ms 1.8MB 0ms 0ms rustc 1.89.0-nightly
wasm 1.rs 6.8ms 0.2ms 18.0MB 0ms 0ms wasmtime 32.0.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 35ms 7.9ms 1.8MB 27ms 0ms rustc 1.87.0
rust 1.rs 51ms 6.1ms 1.9MB 43ms 0ms rustc 1.87.0
wasm 1.rs 89ms 0.7ms 17.5MB 77ms 0ms wasmtime 32.0.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 139ms 28ms 1.9MB 130ms 0ms rustc 1.87.0
rust 1.rs 191ms 16ms 1.9MB 183ms 0ms rustc 1.87.0
wasm 1.rs 252ms 2.7ms 19.4MB 240ms 0ms wasmtime 32.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 24ms 1.0ms 1.8MB 17ms 0ms rustc 1.87.0
rust 1.rs 31ms 0.2ms 1.8MB 20ms 0ms rustc 1.87.0
wasm 1.rs 47ms 0.6ms 17.9MB 33ms 0ms wasmtime 32.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 265ms 15ms 4.9MB 253ms 0ms rustc 1.89.0-nightly
rust 8.rs 291ms 0.6ms 4.8MB 280ms 0ms rustc 1.87.0
wasm 8.rs 819ms 2.4ms 20.8MB 803ms 0ms wasmtime 32.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 13ms 0.5ms 2.0MB 10ms 0ms rustc 1.89.0-nightly
rust 8.rs 14ms 0.2ms 1.9MB 10ms 0ms rustc 1.87.0
wasm 8.rs 43ms 0.2ms 17.9MB 30ms 0ms wasmtime 32.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 698ms 4.2ms 33.8MB 673ms 10ms rustc 1.87.0
wasm 1.rs 901ms 10ms 43.7MB 873ms 10ms wasmtime 32.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 153ms 2.6ms 9.8MB 143ms 0ms rustc 1.87.0
wasm 1.rs 197ms 2.6ms 23.7MB 180ms 0ms wasmtime 32.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 164ms 0.6ms 1.8MB 160ms 0ms rustc 1.87.0
rust 7-i.rs 218ms 0.5ms 1.8MB 210ms 0ms rustc 1.87.0
rust 1.rs 229ms 1.1ms 1.8MB 220ms 0ms rustc 1.87.0
rust 2.rs 279ms 0.0ms 1.8MB 270ms 0ms rustc 1.87.0
rust 3.rs 279ms 0.5ms 1.8MB 270ms 0ms rustc 1.89.0-nightly
wasm 1.rs 407ms 0.1ms 18.2MB 393ms 0ms wasmtime 32.0.0
wasm 2.rs 563ms 1.8ms 17.8MB 550ms 0ms wasmtime 32.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 18ms 0.1ms 1.8MB 10ms 0ms rustc 1.87.0
rust 7-i.rs 24ms 0.4ms 1.8MB 20ms 0ms rustc 1.87.0
rust 1.rs 25ms 0.4ms 1.8MB 20ms 0ms rustc 1.87.0
rust 2.rs 30ms 0.0ms 1.6MB 20ms 0ms rustc 1.87.0
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.89.0-nightly
wasm 1.rs 49ms 0.9ms 18.0MB 40ms 0ms wasmtime 32.0.0
wasm 2.rs 65ms 1.2ms 18.1MB 53ms 0ms wasmtime 32.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 2.rs 301ms 0.2ms 6.6MB 290ms 0ms rustc 1.87.0
rust 1.rs 331ms 4.3ms 40.9MB 317ms 0ms rustc 1.87.0
wasm 2.rs 368ms 9.3ms 22.8MB 357ms 0ms wasmtime 32.0.0
wasm 1.rs 476ms 1.3ms 56.7MB 460ms 0ms wasmtime 32.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 67ms 0.1ms 11.6MB 57ms 0ms rustc 1.87.0
rust 2.rs 77ms 2.0ms 2.9MB 70ms 0ms rustc 1.87.0
wasm 1.rs 96ms 3.0ms 27.5MB 83ms 0ms wasmtime 32.0.0
wasm 2.rs 97ms 2.1ms 18.9MB 83ms 0ms wasmtime 32.0.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1529ms 17ms 2.7MB 1310ms 203ms rustc 1.87.0
rust 2.rs 1712ms 5.2ms 2.7MB 1627ms 70ms rustc 1.87.0
wasm 2.rs 2153ms 20ms 19.1MB 2140ms 0ms wasmtime 32.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 321ms 3.7ms 2.4MB 297ms 10ms rustc 1.87.0
rust 2.rs 385ms 5.9ms 2.4MB 377ms 0ms rustc 1.87.0
wasm 2.rs 504ms 1.2ms 18.1MB 490ms 0ms wasmtime 32.0.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 117ms 2.1ms 1.8MB 110ms 0ms rustc 1.87.0
rust 1.rs 1448ms 50ms 1.9MB 1437ms 0ms rustc 1.87.0
wasm 1.rs 3424ms 13ms 17.6MB 3410ms 0ms wasmtime 32.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 31ms 0.7ms 1.8MB 23ms 0ms rustc 1.87.0
rust 1.rs 357ms 4.0ms 1.9MB 347ms 0ms rustc 1.87.0
wasm 1.rs 862ms 4.0ms 17.6MB 850ms 0ms wasmtime 32.0.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 493ms 0.6ms 2.5MB 1910ms 0ms rustc 1.89.0-nightly
rust 7-m.rs 493ms 0.7ms 2.1MB 1910ms 0ms rustc 1.87.0
rust 8.rs 993ms 1.0ms 2.3MB 983ms 0ms rustc 1.89.0-nightly
rust 7.rs 1961ms 4.4ms 1.9MB 1950ms 0ms rustc 1.87.0
rust 2-m.rs 2070ms 3.8ms 2.3MB 8130ms 10ms rustc 1.87.0
wasm 2.rs 3700ms 13ms 17.7MB 3687ms 0ms wasmtime 32.0.0
rust 2.rs 4266ms 1.8ms 2.1MB 4257ms 0ms rustc 1.87.0
wasm 7.rs 4896ms 4.6ms 17.6MB 4883ms 0ms wasmtime 32.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 127ms 0.5ms 2.3MB 467ms 3ms rustc 1.89.0-nightly
rust 7-m.rs 128ms 0.3ms 2.1MB 467ms 3ms rustc 1.87.0
rust 8.rs 251ms 0.6ms 2.0MB 240ms 0ms rustc 1.89.0-nightly
rust 7.rs 493ms 1.4ms 1.8MB 480ms 0ms rustc 1.87.0
rust 2-m.rs 521ms 0.9ms 2.3MB 2030ms 0ms rustc 1.87.0
wasm 2.rs 932ms 4.9ms 17.6MB 920ms 0ms wasmtime 32.0.0
rust 2.rs 1069ms 4.4ms 2.0MB 1063ms 0ms rustc 1.87.0
wasm 7.rs 1230ms 0.5ms 18.1MB 1220ms 0ms wasmtime 32.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 35ms 0.1ms 2.1MB 107ms 3ms rustc 1.89.0-nightly
rust 7-m.rs 36ms 0.6ms 2.0MB 113ms 0ms rustc 1.87.0
rust 8.rs 65ms 0.9ms 1.9MB 60ms 0ms rustc 1.89.0-nightly
rust 7.rs 128ms 2.5ms 1.8MB 120ms 0ms rustc 1.87.0
rust 2-m.rs 134ms 0.7ms 2.1MB 490ms 3ms rustc 1.87.0
wasm 2.rs 238ms 0.5ms 18.2MB 227ms 0ms wasmtime 32.0.0
rust 2.rs 269ms 1.2ms 1.9MB 260ms 0ms rustc 1.87.0
wasm 7.rs 314ms 0.7ms 17.9MB 300ms 0ms wasmtime 32.0.0