Programming Language and compiler
Benchmarks

Wasm VS Rust benchmarks

Current benchmark data was generated on Mon Jun 23 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 3.7ms 33.6MB 1260ms 10ms rustc 1.87.0
rust 5.rs 1360ms 12ms 33.8MB 1337ms 7ms rustc 1.87.0
rust 3.rs 1485ms 57ms 49.8MB 1453ms 17ms rustc 1.87.0
wasm 5.rs 1914ms 16ms 35.7MB 1893ms 10ms wasmtime 34.0.0
wasm 4.rs 1932ms 53ms 33.7MB 1910ms 10ms wasmtime 34.0.0
wasm 3.rs 1979ms 111ms 50.0MB 1950ms 20ms wasmtime 34.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4.rs 124ms 2.4ms 5.8MB 113ms 0ms rustc 1.87.0
rust 5.rs 127ms 3.7ms 5.8MB 117ms 0ms rustc 1.87.0
rust 3.rs 138ms 7.0ms 7.8MB 127ms 0ms rustc 1.87.0
wasm 5.rs 172ms 1.4ms 19.8MB 157ms 0ms wasmtime 34.0.0
wasm 4.rs 174ms 2.0ms 19.8MB 163ms 0ms wasmtime 34.0.0
wasm 3.rs 181ms 4.1ms 21.7MB 163ms 0ms wasmtime 34.0.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-m.rs 529ms 9.1ms 9.1MB 2003ms 57ms rustc 1.87.0
rust 5-m.rs 548ms 114ms 5.5MB 2063ms 63ms rustc 1.87.0
rust 1-m.rs 918ms 4.0ms 7.4MB 3403ms 190ms rustc 1.87.0
rust 3.rs 1104ms 13ms 9.3MB 1063ms 27ms rustc 1.87.0
wasm 3.rs 1130ms 4.9ms 20.1MB 1113ms 7ms wasmtime 34.0.0
rust 4.rs 1879ms 5.7ms 6.9MB 1863ms 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 52ms 1.9ms 3.3MB 163ms 7ms rustc 1.87.0
rust 3-m.rs 59ms 3.2ms 4.4MB 187ms 10ms rustc 1.87.0
rust 3.rs 67ms 0.4ms 4.0MB 57ms 0ms rustc 1.87.0
rust 1-m.rs 71ms 0.4ms 3.5MB 223ms 20ms rustc 1.87.0
wasm 3.rs 80ms 1.0ms 18.6MB 70ms 0ms wasmtime 34.0.0
rust 4.rs 118ms 4.8ms 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 121ms 2.3ms 3.6MB 113ms 0ms rustc 1.87.0
wasm 1.rs 418ms 0.4ms 19.3MB 403ms 0ms wasmtime 34.0.0
rust 2.rs 427ms 1.5ms 3.6MB 417ms 0ms rustc 1.87.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 34ms 1.6ms 2.9MB 30ms 0ms rustc 1.87.0
rust 2.rs 76ms 0.1ms 3.0MB 70ms 0ms rustc 1.87.0
wasm 1.rs 116ms 0.9ms 18.8MB 103ms 0ms wasmtime 34.0.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 412ms 1.0ms 2.1MB 1587ms 0ms rustc 1.87.0
rust 5-m.rs 558ms 5.3ms 2.1MB 2150ms 0ms rustc 1.87.0
rust 2-im.rs 666ms 4.7ms 2.0MB 2570ms 0ms rustc 1.87.0
rust 1-m.rs 959ms 43ms 2.1MB 3667ms 0ms rustc 1.87.0
rust 3-i.rs 1498ms 0.7ms 1.8MB 1490ms 0ms rustc 1.87.0
rust 2-i.rs 2345ms 0.3ms 1.8MB 2337ms 0ms rustc 1.87.0
rust 1.rs 2722ms 8.7ms 1.8MB 2713ms 0ms rustc 1.87.0
wasm 1.rs 4068ms 6.6ms 17.6MB 4053ms 0ms wasmtime 34.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 3-im.rs 38ms 0.4ms 2.0MB 123ms 0ms rustc 1.87.0
rust 5-m.rs 52ms 0.7ms 2.1MB 170ms 0ms rustc 1.87.0
rust 2-im.rs 61ms 2.1ms 2.1MB 207ms 0ms rustc 1.87.0
rust 1-m.rs 82ms 1.9ms 2.1MB 290ms 0ms rustc 1.87.0
rust 3-i.rs 125ms 0.7ms 1.9MB 120ms 0ms rustc 1.87.0
rust 2-i.rs 193ms 0.3ms 1.8MB 183ms 0ms rustc 1.87.0
rust 1.rs 225ms 2.5ms 1.8MB 217ms 0ms rustc 1.87.0
wasm 1.rs 348ms 3.7ms 17.6MB 337ms 0ms wasmtime 34.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 5c-m.rs 89ms 0.4ms 3.4MB 260ms 0ms rustc 1.87.0
rust 6.rs 89ms 0.5ms 1.9MB 80ms 0ms rustc 1.87.0
rust 5-m.rs 94ms 0.8ms 3.2MB 293ms 0ms rustc 1.87.0
rust 1c.rs 162ms 0.5ms 1.9MB 150ms 0ms rustc 1.87.0
rust 1.rs 196ms 1.0ms 1.9MB 190ms 0ms rustc 1.87.0
wasm 1.rs 234ms 1.9ms 19.6MB 220ms 0ms wasmtime 34.0.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 6.rs 12ms 1.2ms 1.9MB 10ms 0ms rustc 1.87.0
rust 5c-m.rs 16ms 0.5ms 3.2MB 27ms 0ms rustc 1.87.0
rust 5-m.rs 17ms 0.5ms 3.2MB 30ms 0ms rustc 1.87.0
rust 1c.rs 19ms 0.3ms 1.9MB 10ms 0ms rustc 1.87.0
rust 1.rs 22ms 0.4ms 2.0MB 10ms 0ms rustc 1.87.0
wasm 1.rs 32ms 0.8ms 17.7MB 20ms 0ms wasmtime 34.0.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1.2ms 0.1ms 1.8MB 0ms 0ms rustc 1.87.0
rust 1.rs 1.2ms 0.0ms 1.8MB 0ms 0ms rustc 1.89.0-nightly
wasm 1.rs 7.1ms 0.1ms 16.7MB 0ms 0ms wasmtime 34.0.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 35ms 5.1ms 1.9MB 27ms 0ms rustc 1.87.0
rust 1.rs 49ms 4.1ms 1.9MB 43ms 0ms rustc 1.87.0
wasm 1.rs 93ms 2.2ms 18.2MB 80ms 0ms wasmtime 34.0.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 143ms 28ms 1.8MB 133ms 0ms rustc 1.87.0
rust 1.rs 175ms 13ms 1.9MB 167ms 0ms rustc 1.87.0
wasm 1.rs 255ms 1.5ms 17.7MB 240ms 0ms wasmtime 34.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0-unsafe.rs 24ms 2.0ms 1.8MB 17ms 0ms rustc 1.87.0
rust 1.rs 29ms 0.5ms 1.8MB 20ms 0ms rustc 1.87.0
wasm 1.rs 48ms 0.7ms 17.9MB 40ms 0ms wasmtime 34.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 256ms 17ms 4.8MB 250ms 0ms rustc 1.89.0-nightly
rust 8.rs 293ms 1.7ms 4.9MB 283ms 0ms rustc 1.87.0
wasm 8.rs 832ms 1.4ms 21.1MB 820ms 0ms wasmtime 34.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 9.rs 12ms 0.5ms 2.0MB 0ms 0ms rustc 1.89.0-nightly
rust 8.rs 14ms 0.1ms 2.0MB 10ms 0ms rustc 1.87.0
wasm 8.rs 44ms 1.0ms 18.2MB 30ms 0ms wasmtime 34.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 708ms 3.5ms 33.8MB 683ms 10ms rustc 1.87.0
wasm 1.rs 903ms 21ms 41.8MB 877ms 10ms wasmtime 34.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 151ms 2.0ms 9.8MB 140ms 0ms rustc 1.87.0
wasm 1.rs 196ms 4.9ms 23.8MB 180ms 0ms wasmtime 34.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 164ms 0.9ms 1.9MB 160ms 0ms rustc 1.87.0
rust 7-i.rs 219ms 0.9ms 1.8MB 210ms 0ms rustc 1.87.0
rust 1.rs 230ms 0.5ms 1.9MB 220ms 0ms rustc 1.87.0
rust 3.rs 279ms 0.3ms 1.9MB 270ms 0ms rustc 1.89.0-nightly
rust 2.rs 279ms 0.6ms 1.8MB 270ms 0ms rustc 1.87.0
wasm 1.rs 404ms 1.2ms 17.7MB 390ms 0ms wasmtime 34.0.0
wasm 2.rs 562ms 1.1ms 17.8MB 550ms 0ms wasmtime 34.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 4-i.rs 19ms 0.1ms 1.8MB 10ms 0ms rustc 1.87.0
rust 7-i.rs 24ms 0.2ms 1.8MB 20ms 0ms rustc 1.87.0
rust 1.rs 25ms 0.2ms 1.8MB 20ms 0ms rustc 1.87.0
rust 3.rs 30ms 0.1ms 1.8MB 20ms 0ms rustc 1.89.0-nightly
rust 2.rs 30ms 0.4ms 1.8MB 20ms 0ms rustc 1.87.0
wasm 1.rs 49ms 0.5ms 17.9MB 37ms 0ms wasmtime 34.0.0
wasm 2.rs 66ms 1.6ms 18.0MB 50ms 0ms wasmtime 34.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 317ms 11ms 40.9MB 300ms 0ms rustc 1.87.0
rust 2.rs 318ms 4.7ms 6.6MB 307ms 0ms rustc 1.87.0
wasm 2.rs 381ms 1.9ms 22.9MB 367ms 0ms wasmtime 34.0.0
wasm 1.rs 613ms 42ms 56.9MB 597ms 10ms wasmtime 34.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 60ms 1.5ms 11.6MB 50ms 0ms rustc 1.87.0
rust 2.rs 78ms 0.2ms 2.9MB 70ms 0ms rustc 1.87.0
wasm 1.rs 95ms 0.7ms 27.6MB 80ms 0ms wasmtime 34.0.0
wasm 2.rs 98ms 1.0ms 20.9MB 87ms 0ms wasmtime 34.0.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 1525ms 8.2ms 2.7MB 1313ms 190ms rustc 1.87.0
rust 2.rs 1715ms 7.5ms 2.7MB 1627ms 73ms rustc 1.87.0
wasm 2.rs 2220ms 15ms 18.7MB 2203ms 0ms wasmtime 34.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 1.rs 326ms 2.2ms 2.4MB 303ms 7ms rustc 1.87.0
rust 2.rs 382ms 2.7ms 2.4MB 370ms 0ms rustc 1.87.0
wasm 2.rs 523ms 2.7ms 18.4MB 510ms 0ms wasmtime 34.0.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 116ms 0.3ms 1.8MB 110ms 0ms rustc 1.87.0
rust 1.rs 1414ms 10ms 1.9MB 1403ms 0ms rustc 1.87.0
wasm 1.rs 3588ms 10ms 17.7MB 3573ms 0ms wasmtime 34.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 0.rs 32ms 1.5ms 1.9MB 23ms 0ms rustc 1.87.0
rust 1.rs 359ms 5.0ms 1.9MB 350ms 0ms rustc 1.87.0
wasm 1.rs 900ms 5.2ms 18.0MB 887ms 0ms wasmtime 34.0.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7-m.rs 492ms 0.0ms 2.1MB 1907ms 7ms rustc 1.87.0
rust 8-m.rs 497ms 4.4ms 2.4MB 1893ms 3ms rustc 1.89.0-nightly
rust 8.rs 991ms 0.5ms 2.3MB 980ms 0ms rustc 1.89.0-nightly
rust 7.rs 1957ms 10ms 1.9MB 1947ms 0ms rustc 1.87.0
rust 2-m.rs 2070ms 0.9ms 2.3MB 8153ms 7ms rustc 1.87.0
wasm 2.rs 3609ms 13ms 17.7MB 3590ms 0ms wasmtime 34.0.0
rust 2.rs 4266ms 8.9ms 2.1MB 4257ms 0ms rustc 1.87.0
wasm 7.rs 4900ms 13ms 17.7MB 4887ms 0ms wasmtime 34.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 7-m.rs 128ms 0.4ms 2.1MB 470ms 0ms rustc 1.87.0
rust 8-m.rs 128ms 0.2ms 2.3MB 470ms 0ms rustc 1.89.0-nightly
rust 8.rs 250ms 0.1ms 2.1MB 240ms 0ms rustc 1.89.0-nightly
rust 7.rs 495ms 6.2ms 1.8MB 487ms 0ms rustc 1.87.0
rust 2-m.rs 521ms 0.3ms 2.1MB 2020ms 3ms rustc 1.87.0
wasm 2.rs 908ms 2.9ms 19.5MB 893ms 0ms wasmtime 34.0.0
rust 2.rs 1067ms 0.1ms 2.0MB 1060ms 0ms rustc 1.87.0
wasm 7.rs 1231ms 2.5ms 18.1MB 1220ms 0ms wasmtime 34.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
rust 8-m.rs 36ms 0.5ms 2.3MB 110ms 0ms rustc 1.89.0-nightly
rust 7-m.rs 36ms 0.5ms 2.0MB 113ms 0ms rustc 1.87.0
rust 8.rs 65ms 0.5ms 2.0MB 60ms 0ms rustc 1.89.0-nightly
rust 7.rs 125ms 1.2ms 1.9MB 120ms 0ms rustc 1.87.0
rust 2-m.rs 134ms 0.3ms 2.0MB 490ms 0ms rustc 1.87.0
wasm 2.rs 234ms 0.4ms 17.8MB 220ms 0ms wasmtime 34.0.0
rust 2.rs 269ms 0.2ms 1.9MB 260ms 0ms rustc 1.87.0
wasm 7.rs 316ms 2.7ms 17.4MB 300ms 0ms wasmtime 34.0.0