Programming Language and compiler
Benchmarks

Zig VS Wasm benchmarks

Current benchmark data was generated on Mon Mar 31 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 5.rs 1797ms 32ms 33.1MB 1777ms 10ms wasmtime 31.0.0
zig 1.zig 1822ms 94ms 49.0MB 1787ms 20ms zig 0.14.0
wasm 3.rs 1834ms 21ms 49.1MB 1803ms 20ms wasmtime 31.0.0
wasm 4.rs 1842ms 12ms 33.1MB 1823ms 7ms wasmtime 31.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 154ms 1.6ms 7.0MB 140ms 0ms zig 0.14.0
wasm 5.rs 170ms 3.3ms 19.1MB 157ms 0ms wasmtime 31.0.0
wasm 4.rs 181ms 5.1ms 19.2MB 167ms 0ms wasmtime 31.0.0
wasm 3.rs 181ms 5.6ms 21.2MB 167ms 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 419ms 3.7ms 18.6MB 407ms 0ms wasmtime 31.0.0
zig 1.zig 2250ms 2.7ms 2.5MB 2220ms 13ms zig 0.14.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 112ms 0.5ms 17.9MB 100ms 0ms wasmtime 31.0.0
zig 1.zig 380ms 1.3ms 1.9MB 360ms 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 634ms 1.8ms 1.4MB 2393ms 0ms zig 0.14.0
zig 3-i.zig 1767ms 0.8ms 1.0MB 1760ms 0ms zig 0.14.0
zig 1.zig 2716ms 0.8ms 1.0MB 2710ms 0ms zig 0.14.0
wasm 1.rs 4151ms 19ms 17.3MB 4137ms 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 0.8ms 1.4MB 200ms 0ms zig 0.14.0
zig 3-i.zig 147ms 0.6ms 1.0MB 140ms 0ms zig 0.14.0
zig 1.zig 229ms 0.5ms 1.0MB 220ms 0ms zig 0.14.0
wasm 1.rs 349ms 3.1ms 16.7MB 333ms 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 89ms 0.3ms 1.0MB 80ms 0ms zig 0.14.0
wasm 1.rs 237ms 1.7ms 17.2MB 223ms 0ms 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 1.1MB 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 7.2ms 0.3ms 17.1MB 0ms 0ms wasmtime 31.0.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 499ms 8.5ms 26.3MB 477ms 7ms zig 0.14.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 66ms 2.2ms 15.4MB 53ms 3ms zig 0.14.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 34ms 0.8ms 2.8MB 27ms 0ms zig 0.14.0
wasm 1.rs 90ms 1.4ms 17.4MB 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 92ms 0.9ms 2.8MB 83ms 0ms zig 0.14.0
wasm 1.rs 258ms 14ms 17.0MB 247ms 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 16ms 0.7ms 1.3MB 10ms 0ms zig 0.14.0
wasm 1.rs 48ms 0.7ms 16.8MB 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 2.2ms 4.0MB 237ms 0ms zig 0.14.0
wasm 8.rs 820ms 0.9ms 20.2MB 807ms 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 0.4ms 1.1MB 0ms 0ms zig 0.14.0
wasm 8.rs 43ms 1.1ms 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
zig 1.zig 855ms 3.1ms 41.0MB 827ms 13ms zig 0.14.0
wasm 1.rs 887ms 2.5ms 41.3MB 863ms 10ms wasmtime 31.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 173ms 2.3ms 11.0MB 160ms 0ms zig 0.14.0
wasm 1.rs 195ms 1.6ms 23.1MB 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 199ms 0.7ms 1.0MB 190ms 0ms zig 0.14.0
zig 2.zig 279ms 0.3ms 1.0MB 270ms 0ms zig 0.14.0
zig 1.zig 316ms 1.3ms 1.1MB 303ms 0ms zig 0.14.0
wasm 1.rs 410ms 2.0ms 17.0MB 400ms 0ms wasmtime 31.0.0
wasm 2.rs 581ms 2.6ms 17.0MB 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 0.3ms 1.0MB 10ms 0ms zig 0.14.0
zig 2.zig 30ms 0.2ms 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 49ms 1.2ms 17.0MB 37ms 0ms wasmtime 31.0.0
wasm 2.rs 65ms 0.3ms 17.2MB 50ms 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 1.5ms 40.1MB 250ms 0ms zig 0.14.0
zig 2.zig 322ms 3.8ms 6.0MB 313ms 0ms zig 0.14.0
wasm 2.rs 375ms 1.7ms 22.0MB 360ms 0ms wasmtime 31.0.0
wasm 1.rs 468ms 5.9ms 56.1MB 453ms 0ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 52ms 1.4ms 10.8MB 40ms 0ms zig 0.14.0
zig 2.zig 81ms 1.3ms 2.3MB 70ms 0ms zig 0.14.0
wasm 1.rs 95ms 3.2ms 26.9MB 80ms 0ms wasmtime 31.0.0
wasm 2.rs 97ms 0.6ms 18.4MB 87ms 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 2214ms 13ms 18.1MB 2200ms 0ms wasmtime 31.0.0
zig 1.zig 2465ms 18ms 2.2MB 2437ms 13ms zig 0.14.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 524ms 3.6ms 17.3MB 510ms 0ms wasmtime 31.0.0
zig 1.zig 569ms 2.6ms 1.6MB 560ms 0ms zig 0.14.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 3595ms 1.5ms 16.9MB 3580ms 0ms wasmtime 31.0.0
zig 1.zig 3705ms 29ms 1.4MB 3693ms 0ms zig 0.14.0
wasm 7.rs 4901ms 6.9ms 17.1MB 4887ms 0ms wasmtime 31.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 907ms 1.5ms 16.9MB 893ms 0ms wasmtime 31.0.0
zig 1.zig 922ms 1.2ms 1.3MB 910ms 0ms zig 0.14.0
wasm 7.rs 1232ms 2.1ms 17.4MB 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 0.8ms 1.3MB 223ms 0ms zig 0.14.0
wasm 2.rs 234ms 1.3ms 16.7MB 220ms 0ms wasmtime 31.0.0
wasm 7.rs 315ms 0.6ms 16.7MB 300ms 0ms wasmtime 31.0.0