Programming Language and compiler
Benchmarks

Wasm VS Rust 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
rust 4.rs 1316ms 18ms 33.6MB 1293ms 10ms rustc 1.88.0
rust 5.rs 1480ms 41ms 33.8MB 1457ms 7ms rustc 1.88.0
rust 3.rs 1534ms 41ms 49.8MB 1507ms 17ms rustc 1.88.0
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
rust 4.rs 123ms 1.4ms 5.6MB 110ms 0ms rustc 1.88.0
rust 5.rs 126ms 1.2ms 5.8MB 117ms 0ms rustc 1.88.0
rust 3.rs 135ms 4.9ms 7.8MB 123ms 0ms rustc 1.88.0
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
rust 3-m.rs 527ms 34ms 9.1MB 1957ms 63ms rustc 1.88.0
rust 5-m.rs 700ms 11ms 5.5MB 2660ms 70ms rustc 1.88.0
rust 1-m.rs 942ms 2.5ms 7.1MB 3490ms 197ms rustc 1.88.0
wasm 3.rs 1111ms 16ms 20.4MB 1100ms 0ms wasmtime 34.0.1
rust 3.rs 1155ms 7.3ms 9.3MB 1120ms 20ms rustc 1.88.0
rust 4.rs 1957ms 2.4ms 6.9MB 1940ms 0ms rustc 1.88.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5-m.rs 54ms 2.3ms 3.1MB 160ms 10ms rustc 1.88.0
rust 3-m.rs 58ms 4.8ms 4.1MB 180ms 10ms rustc 1.88.0
rust 1-m.rs 72ms 0.4ms 3.5MB 233ms 20ms rustc 1.88.0
rust 3.rs 74ms 3.7ms 4.0MB 63ms 0ms rustc 1.88.0
wasm 3.rs 77ms 0.4ms 19.1MB 67ms 0ms wasmtime 34.0.1
rust 4.rs 119ms 2.9ms 3.1MB 110ms 0ms rustc 1.88.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 121ms 1.6ms 3.6MB 110ms 0ms rustc 1.88.0
wasm 1.rs 419ms 6.5ms 19.5MB 403ms 0ms wasmtime 34.0.1
rust 2.rs 425ms 1.3ms 3.6MB 413ms 0ms rustc 1.88.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 34ms 1.4ms 2.9MB 30ms 0ms rustc 1.88.0
rust 2.rs 78ms 1.8ms 3.0MB 70ms 0ms rustc 1.88.0
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
rust 3-im.rs 411ms 5.2ms 2.0MB 1570ms 0ms rustc 1.88.0
rust 5-m.rs 551ms 4.1ms 2.0MB 2133ms 0ms rustc 1.88.0
rust 2-im.rs 672ms 14ms 2.1MB 2573ms 0ms rustc 1.88.0
rust 1-m.rs 940ms 12ms 2.0MB 3637ms 0ms rustc 1.88.0
rust 3-i.rs 1508ms 1.0ms 1.9MB 1500ms 0ms rustc 1.88.0
rust 2-i.rs 2416ms 18ms 1.8MB 2407ms 0ms rustc 1.88.0
rust 1.rs 2785ms 14ms 1.8MB 2773ms 0ms rustc 1.88.0
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
rust 3-im.rs 38ms 0.1ms 2.0MB 120ms 0ms rustc 1.88.0
rust 5-m.rs 53ms 0.8ms 2.1MB 170ms 0ms rustc 1.88.0
rust 2-im.rs 62ms 0.1ms 2.0MB 203ms 0ms rustc 1.88.0
rust 1-m.rs 84ms 1.5ms 2.1MB 290ms 0ms rustc 1.88.0
rust 3-i.rs 126ms 0.3ms 1.9MB 120ms 0ms rustc 1.88.0
rust 2-i.rs 198ms 0.3ms 1.8MB 190ms 0ms rustc 1.88.0
rust 1.rs 229ms 3.3ms 1.8MB 223ms 0ms rustc 1.88.0
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
rust 6.rs 88ms 1.4ms 1.9MB 80ms 0ms rustc 1.88.0
rust 5c-m.rs 90ms 0.0ms 3.4MB 260ms 0ms rustc 1.88.0
rust 5-m.rs 93ms 0.3ms 3.2MB 287ms 0ms rustc 1.88.0
rust 1c.rs 163ms 1.1ms 1.9MB 153ms 0ms rustc 1.88.0
rust 1.rs 196ms 1.1ms 1.9MB 187ms 0ms rustc 1.88.0
wasm 1.rs 235ms 3.7ms 18.2MB 220ms 0ms wasmtime 34.0.1

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 6.rs 12ms 1.3ms 1.9MB 10ms 0ms rustc 1.88.0
rust 5-m.rs 16ms 0.4ms 3.2MB 27ms 0ms rustc 1.88.0
rust 5c-m.rs 17ms 0.2ms 3.2MB 23ms 0ms rustc 1.88.0
rust 1c.rs 18ms 0.2ms 1.9MB 10ms 0ms rustc 1.88.0
rust 1.rs 22ms 0.1ms 1.9MB 13ms 0ms rustc 1.88.0
wasm 1.rs 32ms 1.2ms 18.2MB 20ms 0ms wasmtime 34.0.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1.2ms 0.1ms 1.8MB 0ms 0ms rustc 1.88.0
rust 1.rs 1.2ms 0.0ms 1.9MB 0ms 0ms rustc 1.90.0-nightly
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
rust 0-unsafe.rs 36ms 6.0ms 1.8MB 27ms 0ms rustc 1.88.0
rust 1.rs 50ms 10ms 1.9MB 40ms 0ms rustc 1.88.0
wasm 1.rs 90ms 1.3ms 18.5MB 80ms 0ms wasmtime 34.0.1

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 145ms 6.3ms 1.8MB 137ms 0ms rustc 1.88.0
rust 1.rs 212ms 32ms 1.9MB 203ms 0ms rustc 1.88.0
wasm 1.rs 253ms 2.7ms 17.9MB 240ms 0ms wasmtime 34.0.1

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 24ms 0.4ms 1.8MB 20ms 0ms rustc 1.88.0
rust 1.rs 30ms 0.9ms 1.8MB 20ms 0ms rustc 1.88.0
wasm 1.rs 47ms 1.0ms 17.7MB 33ms 0ms wasmtime 34.0.1

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 246ms 0.4ms 4.8MB 240ms 0ms rustc 1.90.0-nightly
rust 8.rs 293ms 0.9ms 4.8MB 283ms 0ms rustc 1.88.0
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
rust 9.rs 12ms 0.1ms 1.9MB 0ms 0ms rustc 1.90.0-nightly
rust 8.rs 15ms 0.3ms 2.0MB 10ms 0ms rustc 1.88.0
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
rust 1.rs 720ms 21ms 33.8MB 697ms 10ms rustc 1.88.0
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
rust 1.rs 154ms 3.2ms 9.8MB 143ms 0ms rustc 1.88.0
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
rust 4-i.rs 164ms 0.2ms 1.8MB 160ms 0ms rustc 1.88.0
rust 7-i.rs 219ms 1.1ms 1.8MB 210ms 0ms rustc 1.88.0
rust 1.rs 229ms 0.5ms 1.8MB 220ms 0ms rustc 1.88.0
rust 3.rs 279ms 0.7ms 1.9MB 270ms 0ms rustc 1.90.0-nightly
rust 2.rs 279ms 0.5ms 1.6MB 270ms 0ms rustc 1.88.0
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
rust 4-i.rs 18ms 0.1ms 1.8MB 10ms 0ms rustc 1.88.0
rust 7-i.rs 24ms 0.5ms 1.8MB 20ms 0ms rustc 1.88.0
rust 1.rs 25ms 0.4ms 1.8MB 20ms 0ms rustc 1.88.0
rust 2.rs 30ms 0.2ms 1.8MB 20ms 0ms rustc 1.88.0
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.90.0-nightly
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
rust 2.rs 304ms 3.2ms 6.6MB 293ms 0ms rustc 1.88.0
rust 1.rs 327ms 7.2ms 40.9MB 313ms 0ms rustc 1.88.0
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
rust 1.rs 59ms 2.3ms 11.6MB 50ms 0ms rustc 1.88.0
rust 2.rs 78ms 1.2ms 2.9MB 70ms 0ms rustc 1.88.0
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
rust 1.rs 1528ms 7.9ms 2.7MB 1313ms 197ms rustc 1.88.0
rust 2.rs 1722ms 8.2ms 2.7MB 1643ms 67ms rustc 1.88.0
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
rust 1.rs 321ms 2.4ms 2.4MB 297ms 10ms rustc 1.88.0
rust 2.rs 385ms 5.8ms 2.4MB 373ms 0ms rustc 1.88.0
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
rust 0.rs 118ms 3.7ms 1.9MB 110ms 0ms rustc 1.88.0
rust 1.rs 1433ms 14ms 1.9MB 1423ms 0ms rustc 1.88.0
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
rust 0.rs 32ms 1.9ms 1.8MB 23ms 0ms rustc 1.88.0
rust 1.rs 366ms 4.2ms 1.9MB 353ms 0ms rustc 1.88.0
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
rust 8-m.rs 493ms 0.8ms 2.5MB 1907ms 3ms rustc 1.90.0-nightly
rust 7-m.rs 493ms 0.4ms 2.1MB 1910ms 0ms rustc 1.88.0
rust 8.rs 994ms 2.7ms 2.4MB 983ms 0ms rustc 1.90.0-nightly
rust 7.rs 1927ms 5.1ms 1.9MB 1917ms 0ms rustc 1.88.0
rust 2-m.rs 2073ms 4.7ms 2.4MB 8130ms 10ms rustc 1.88.0
wasm 2.rs 3600ms 5.7ms 18.3MB 3587ms 0ms wasmtime 34.0.1
rust 2.rs 4274ms 5.2ms 2.0MB 4267ms 0ms rustc 1.88.0
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
rust 8-m.rs 127ms 0.4ms 2.3MB 467ms 3ms rustc 1.90.0-nightly
rust 7-m.rs 128ms 0.8ms 2.3MB 467ms 0ms rustc 1.88.0
rust 8.rs 251ms 0.7ms 2.1MB 240ms 0ms rustc 1.90.0-nightly
rust 7.rs 491ms 1.9ms 1.8MB 480ms 0ms rustc 1.88.0
rust 2-m.rs 521ms 0.5ms 2.1MB 2023ms 3ms rustc 1.88.0
wasm 2.rs 907ms 0.5ms 17.7MB 893ms 0ms wasmtime 34.0.1
rust 2.rs 1070ms 2.2ms 1.9MB 1060ms 0ms rustc 1.88.0
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
rust 8-m.rs 36ms 0.4ms 2.1MB 110ms 3ms rustc 1.90.0-nightly
rust 7-m.rs 36ms 0.4ms 2.0MB 110ms 0ms rustc 1.88.0
rust 8.rs 65ms 0.9ms 2.0MB 60ms 0ms rustc 1.90.0-nightly
rust 7.rs 125ms 1.8ms 1.8MB 120ms 0ms rustc 1.88.0
rust 2-m.rs 134ms 0.5ms 2.1MB 497ms 0ms rustc 1.88.0
wasm 2.rs 234ms 1.4ms 17.6MB 220ms 0ms wasmtime 34.0.1
rust 2.rs 270ms 1.5ms 1.9MB 260ms 0ms rustc 1.88.0
wasm 7.rs 316ms 0.4ms 18.1MB 303ms 0ms wasmtime 34.0.1