Programming Language and compiler
Benchmarks

Wasm VS Zig benchmarks

Current benchmark data was generated on Mon Apr 14 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
wasm 4.rs 1823ms 9.8ms 33.2MB 1800ms 10ms wasmtime 31.0.0
wasm 3.rs 1857ms 49ms 49.2MB 1830ms 17ms wasmtime 31.0.0
zig 1.zig 1894ms 41ms 49.0MB 1867ms 17ms zig 0.14.0
wasm 5.rs 1918ms 279ms 33.1MB 1893ms 7ms wasmtime 31.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 152ms 2.5ms 7.0MB 140ms 0ms zig 0.14.0
wasm 5.rs 169ms 0.6ms 19.2MB 160ms 0ms wasmtime 31.0.0
wasm 3.rs 181ms 4.3ms 21.2MB 167ms 0ms wasmtime 31.0.0
wasm 4.rs 192ms 31ms 19.1MB 180ms 0ms wasmtime 31.0.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1118ms 3.9ms 19.4MB 1107ms 0ms wasmtime 31.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 83ms 3.4ms 18.2MB 73ms 0ms wasmtime 31.0.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 416ms 1.2ms 18.6MB 400ms 0ms wasmtime 31.0.0
zig 1.zig 2266ms 7.9ms 2.5MB 2240ms 17ms zig 0.14.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 115ms 1.4ms 18.0MB 100ms 0ms wasmtime 31.0.0
zig 1.zig 382ms 1.2ms 1.9MB 367ms 0ms zig 0.14.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 631ms 8.0ms 1.4MB 2400ms 0ms zig 0.14.0
zig 3-i.zig 1768ms 2.0ms 1.0MB 1760ms 0ms zig 0.14.0
zig 1.zig 2714ms 7.8ms 1.1MB 2707ms 0ms zig 0.14.0
wasm 1.rs 4206ms 2.3ms 16.7MB 4190ms 0ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 60ms 1.2ms 1.4MB 200ms 0ms zig 0.14.0
zig 3-i.zig 148ms 1.0ms 1.0MB 140ms 0ms zig 0.14.0
zig 1.zig 229ms 0.7ms 1.0MB 220ms 0ms zig 0.14.0
wasm 1.rs 355ms 3.1ms 16.8MB 340ms 0ms wasmtime 31.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 87ms 0.7ms 1.0MB 80ms 0ms zig 0.14.0
wasm 1.rs 236ms 2.4ms 17.2MB 220ms 3ms wasmtime 31.0.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 11ms 0.8ms 1.0MB 0ms 0ms zig 0.14.0
wasm 1.rs 32ms 0.4ms 17.4MB 20ms 0ms wasmtime 31.0.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 1.0ms 0.0ms 1.0MB 0ms 0ms zig 0.14.0
wasm 1.rs 6.6ms 0.4ms 17.3MB 0ms 0ms wasmtime 31.0.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 34ms 1.8ms 2.8MB 23ms 0ms zig 0.14.0
wasm 1.rs 89ms 2.0ms 17.6MB 80ms 0ms wasmtime 31.0.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 93ms 2.6ms 2.8MB 87ms 0ms zig 0.14.0
wasm 1.rs 249ms 1.0ms 16.9MB 240ms 0ms wasmtime 31.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 15ms 0.2ms 1.3MB 10ms 0ms zig 0.14.0
wasm 1.rs 47ms 1.0ms 17.3MB 40ms 0ms wasmtime 31.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 247ms 0.1ms 4.0MB 240ms 0ms zig 0.14.0
wasm 8.rs 823ms 3.1ms 20.2MB 810ms 0ms wasmtime 31.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 12ms 0.2ms 1.1MB 10ms 0ms zig 0.14.0
wasm 8.rs 43ms 0.6ms 17.4MB 30ms 0ms wasmtime 31.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 885ms 5.7ms 41.3MB 857ms 10ms wasmtime 31.0.0
zig 1.zig 905ms 67ms 41.0MB 880ms 10ms zig 0.14.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 178ms 2.5ms 11.0MB 170ms 0ms zig 0.14.0
wasm 1.rs 195ms 4.3ms 23.3MB 180ms 0ms wasmtime 31.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 198ms 0.4ms 1.0MB 190ms 0ms zig 0.14.0
zig 2.zig 280ms 0.3ms 1.0MB 270ms 0ms zig 0.14.0
zig 1.zig 315ms 0.5ms 1.1MB 307ms 0ms zig 0.14.0
wasm 1.rs 400ms 1.5ms 17.1MB 390ms 0ms wasmtime 31.0.0
wasm 2.rs 582ms 0.4ms 17.2MB 570ms 0ms wasmtime 31.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 22ms 0.2ms 1.0MB 10ms 0ms zig 0.14.0
zig 2.zig 30ms 0.1ms 1.0MB 20ms 0ms zig 0.14.0
zig 1.zig 34ms 0.4ms 1.1MB 30ms 0ms zig 0.14.0
wasm 1.rs 48ms 0.4ms 17.0MB 40ms 0ms wasmtime 31.0.0
wasm 2.rs 65ms 0.1ms 17.1MB 53ms 0ms wasmtime 31.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 263ms 1.3ms 40.1MB 250ms 0ms zig 0.14.0
zig 2.zig 328ms 2.0ms 6.0MB 320ms 0ms zig 0.14.0
wasm 2.rs 372ms 4.5ms 22.0MB 360ms 0ms wasmtime 31.0.0
wasm 1.rs 481ms 4.7ms 56.1MB 463ms 0ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 50ms 1.1ms 10.8MB 40ms 0ms zig 0.14.0
zig 2.zig 80ms 0.0ms 2.3MB 70ms 0ms zig 0.14.0
wasm 1.rs 97ms 1.6ms 27.0MB 83ms 0ms wasmtime 31.0.0
wasm 2.rs 98ms 1.4ms 18.3MB 83ms 0ms wasmtime 31.0.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 2163ms 8.9ms 18.1MB 2150ms 0ms wasmtime 31.0.0
zig 1.zig 2458ms 14ms 2.2MB 2430ms 13ms zig 0.14.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 517ms 2.5ms 17.3MB 507ms 0ms wasmtime 31.0.0
zig 1.zig 568ms 5.0ms 1.8MB 557ms 0ms zig 0.14.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3487ms 19ms 17.1MB 3473ms 0ms wasmtime 31.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 878ms 1.3ms 17.1MB 863ms 0ms wasmtime 31.0.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 3601ms 2.7ms 16.9MB 3587ms 0ms wasmtime 31.0.0
zig 1.zig 3690ms 5.3ms 1.4MB 3680ms 0ms zig 0.14.0
wasm 7.rs 4897ms 8.1ms 16.8MB 4880ms 0ms wasmtime 31.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 908ms 1.2ms 16.9MB 897ms 0ms wasmtime 31.0.0
zig 1.zig 923ms 2.2ms 1.3MB 913ms 0ms zig 0.14.0
wasm 7.rs 1232ms 2.1ms 16.8MB 1220ms 0ms wasmtime 31.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 234ms 1.1ms 1.3MB 230ms 0ms zig 0.14.0
wasm 2.rs 235ms 2.0ms 16.7MB 220ms 0ms wasmtime 31.0.0
wasm 7.rs 315ms 1.3ms 17.3MB 300ms 0ms wasmtime 31.0.0