Programming Language and compiler
Benchmarks

Zig VS Wasm benchmarks

Current benchmark data was generated on Sun Jun 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
zig 1.zig 1718ms 14ms 49.0MB 1683ms 20ms zig 0.14.1
wasm 5.rs 1744ms 15ms 33.9MB 1727ms 10ms wasmtime 33.0.0
wasm 3.rs 1791ms 35ms 49.9MB 1760ms 13ms wasmtime 33.0.0
wasm 4.rs 1806ms 5.3ms 33.9MB 1783ms 10ms wasmtime 33.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 150ms 2.1ms 7.0MB 140ms 0ms zig 0.14.1
wasm 5.rs 170ms 3.5ms 20.1MB 160ms 0ms wasmtime 33.0.0
wasm 3.rs 174ms 3.4ms 21.9MB 160ms 0ms wasmtime 33.0.0
wasm 4.rs 195ms 7.7ms 19.9MB 180ms 0ms wasmtime 33.0.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 416ms 1.6ms 19.6MB 403ms 0ms wasmtime 33.0.0
zig 1.zig 2257ms 7.3ms 2.5MB 2230ms 10ms zig 0.14.1

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 114ms 2.6ms 19.0MB 100ms 0ms wasmtime 33.0.0
zig 1.zig 384ms 5.4ms 1.9MB 370ms 0ms zig 0.14.1

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 638ms 2.2ms 1.4MB 2400ms 0ms zig 0.14.1
zig 3-i.zig 1764ms 0.6ms 1.0MB 1753ms 0ms zig 0.14.1
zig 1.zig 2716ms 5.8ms 1.0MB 2707ms 0ms zig 0.14.1
wasm 1.rs 4080ms 18ms 17.4MB 4067ms 0ms wasmtime 33.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 2-m.zig 60ms 0.3ms 1.4MB 200ms 0ms zig 0.14.1
zig 3-i.zig 147ms 0.4ms 1.0MB 140ms 0ms zig 0.14.1
zig 1.zig 229ms 0.8ms 1.0MB 220ms 0ms zig 0.14.1
wasm 1.rs 345ms 3.4ms 17.4MB 333ms 0ms wasmtime 33.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 87ms 1.4ms 1.0MB 80ms 0ms zig 0.14.1
wasm 1.rs 232ms 1.5ms 18.0MB 217ms 0ms wasmtime 33.0.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 10ms 0.1ms 1.0MB 0ms 0ms zig 0.14.1
wasm 1.rs 31ms 0.6ms 18.0MB 20ms 0ms wasmtime 33.0.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 1.1ms 0.4ms 1.1MB 0ms 0ms zig 0.14.1
wasm 1.rs 6.2ms 0.3ms 15.3MB 0ms 0ms wasmtime 33.0.0

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1-m.zig 314ms 1.1ms 66.5MB 827ms 30ms zig 0.14.1
zig 1.zig 500ms 5.4ms 28.0MB 483ms 7ms zig 0.14.1

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1-m.zig 63ms 0.5ms 54.3MB 123ms 33ms zig 0.14.1
zig 1.zig 66ms 1.0ms 15.5MB 50ms 0ms zig 0.14.1

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 35ms 0.8ms 2.8MB 30ms 0ms zig 0.14.1
wasm 1.rs 91ms 1.0ms 17.7MB 80ms 0ms wasmtime 33.0.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 95ms 3.4ms 2.8MB 87ms 0ms zig 0.14.1
wasm 1.rs 253ms 2.5ms 17.6MB 240ms 0ms wasmtime 33.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 15ms 0.4ms 1.3MB 10ms 0ms zig 0.14.1
wasm 1.rs 47ms 0.4ms 17.5MB 37ms 0ms wasmtime 33.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 247ms 0.8ms 4.1MB 240ms 0ms zig 0.14.1
wasm 8.rs 832ms 3.3ms 21.1MB 817ms 0ms wasmtime 33.0.0

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 0.14.1
wasm 8.rs 43ms 1.0ms 18.2MB 30ms 0ms wasmtime 33.0.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 856ms 8.4ms 41.0MB 830ms 10ms zig 0.14.1
wasm 1.rs 869ms 4.9ms 41.9MB 847ms 10ms wasmtime 33.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 178ms 3.3ms 11.0MB 167ms 0ms zig 0.14.1
wasm 1.rs 193ms 3.5ms 26.0MB 177ms 0ms wasmtime 33.0.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 198ms 1.0ms 1.0MB 190ms 0ms zig 0.14.1
zig 2.zig 279ms 0.5ms 1.0MB 270ms 0ms zig 0.14.1
zig 1.zig 315ms 0.7ms 1.1MB 310ms 0ms zig 0.14.1
wasm 1.rs 404ms 2.3ms 18.1MB 390ms 0ms wasmtime 33.0.0
wasm 2.rs 565ms 4.4ms 18.1MB 547ms 0ms wasmtime 33.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 3.zig 21ms 0.2ms 1.0MB 10ms 0ms zig 0.14.1
zig 2.zig 30ms 0.1ms 1.0MB 20ms 0ms zig 0.14.1
zig 1.zig 34ms 0.6ms 1.1MB 30ms 0ms zig 0.14.1
wasm 1.rs 48ms 1.3ms 18.1MB 37ms 0ms wasmtime 33.0.0
wasm 2.rs 64ms 1.1ms 18.4MB 50ms 0ms wasmtime 33.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 255ms 8.2ms 40.2MB 240ms 0ms zig 0.14.1
zig 2.zig 328ms 2.8ms 6.0MB 320ms 0ms zig 0.14.1
wasm 2.rs 373ms 4.4ms 22.9MB 357ms 0ms wasmtime 33.0.0
wasm 1.rs 454ms 1.1ms 57.0MB 440ms 0ms wasmtime 33.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 55ms 1.4ms 10.9MB 43ms 0ms zig 0.14.1
zig 2.zig 81ms 1.1ms 2.3MB 70ms 0ms zig 0.14.1
wasm 1.rs 94ms 1.3ms 27.7MB 80ms 0ms wasmtime 33.0.0
wasm 2.rs 95ms 0.6ms 19.2MB 80ms 0ms wasmtime 33.0.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 2212ms 2.7ms 21.0MB 2197ms 0ms wasmtime 33.0.0
zig 1.zig 2458ms 11ms 2.3MB 2430ms 17ms zig 0.14.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 524ms 4.1ms 18.3MB 513ms 0ms wasmtime 33.0.0
zig 1.zig 565ms 4.7ms 1.8MB 553ms 0ms zig 0.14.1

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 3597ms 4.4ms 17.7MB 3583ms 0ms wasmtime 33.0.0
zig 1.zig 3684ms 1.8ms 1.4MB 3670ms 0ms zig 0.14.1
wasm 7.rs 4900ms 7.4ms 17.7MB 4887ms 0ms wasmtime 33.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 905ms 1.7ms 18.2MB 890ms 0ms wasmtime 33.0.0
zig 1.zig 927ms 2.1ms 1.3MB 920ms 0ms zig 0.14.1
wasm 7.rs 1229ms 2.0ms 17.7MB 1217ms 0ms wasmtime 33.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 232ms 0.3ms 1.3MB 220ms 0ms zig 0.14.1
wasm 2.rs 233ms 1.4ms 18.3MB 220ms 0ms wasmtime 33.0.0
wasm 7.rs 315ms 1.6ms 17.7MB 300ms 0ms wasmtime 33.0.0