Programming Language and compiler
Benchmarks

Zig VS Wasm benchmarks

Current benchmark data was generated on Tue Mar 25 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 1828ms 60ms 33.1MB 1810ms 10ms wasmtime 31.0.0
wasm 4.rs 1855ms 21ms 33.1MB 1833ms 10ms wasmtime 31.0.0
wasm 3.rs 1870ms 21ms 49.2MB 1847ms 10ms wasmtime 31.0.0
zig 1.zig 1906ms 32ms 49.0MB 1873ms 17ms zig 0.14.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 153ms 1.1ms 7.0MB 140ms 0ms zig 0.14.0
wasm 5.rs 171ms 2.0ms 19.2MB 160ms 0ms wasmtime 31.0.0
wasm 4.rs 179ms 1.6ms 19.2MB 167ms 0ms wasmtime 31.0.0
wasm 3.rs 187ms 5.5ms 21.1MB 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 425ms 3.8ms 18.6MB 410ms 0ms wasmtime 31.0.0
zig 1.zig 2275ms 0.2ms 2.5MB 2243ms 17ms zig 0.14.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 113ms 2.1ms 18.1MB 100ms 0ms wasmtime 31.0.0
zig 1.zig 384ms 2.2ms 1.9MB 370ms 3ms 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 637ms 0.7ms 1.4MB 2403ms 0ms zig 0.14.0
zig 3-i.zig 1766ms 4.1ms 1.0MB 1753ms 0ms zig 0.14.0
zig 1.zig 2713ms 3.8ms 1.0MB 2707ms 0ms zig 0.14.0
wasm 1.rs 4291ms 13ms 16.7MB 4277ms 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 148ms 0.2ms 1.0MB 140ms 0ms zig 0.14.0
zig 1.zig 230ms 0.3ms 1.0MB 220ms 0ms zig 0.14.0
wasm 1.rs 357ms 0.8ms 16.8MB 343ms 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 88ms 1.2ms 1.0MB 80ms 0ms zig 0.14.0
wasm 1.rs 238ms 2.4ms 17.2MB 223ms 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 0.6ms 17.2MB 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 1.1MB 0ms 0ms zig 0.14.0
wasm 1.rs 7.0ms 0.7ms 17.4MB 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 500ms 4.6ms 26.3MB 480ms 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 0.7ms 15.3MB 50ms 0ms 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 33ms 0.3ms 2.8MB 23ms 0ms zig 0.14.0
wasm 1.rs 89ms 1.7ms 17.3MB 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 95ms 2.4ms 2.8MB 87ms 0ms zig 0.14.0
wasm 1.rs 251ms 3.2ms 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 16ms 1.3ms 1.3MB 10ms 0ms zig 0.14.0
wasm 1.rs 48ms 0.2ms 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 0.1ms 4.0MB 240ms 0ms zig 0.14.0
wasm 8.rs 822ms 1.7ms 20.3MB 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 0.4ms 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 878ms 6.2ms 41.0MB 853ms 10ms zig 0.14.0
wasm 1.rs 906ms 18ms 41.1MB 880ms 10ms wasmtime 31.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 181ms 5.2ms 11.0MB 167ms 0ms zig 0.14.0
wasm 1.rs 198ms 6.2ms 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 2.zig 280ms 0.4ms 1.0MB 270ms 0ms zig 0.14.0
zig 1.zig 315ms 1.2ms 1.1MB 303ms 0ms zig 0.14.0
wasm 1.rs 411ms 4.6ms 17.1MB 400ms 0ms wasmtime 31.0.0
wasm 2.rs 583ms 2.7ms 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 2.zig 30ms 0.1ms 1.0MB 20ms 0ms zig 0.14.0
zig 1.zig 34ms 0.4ms 1.1MB 27ms 0ms zig 0.14.0
wasm 1.rs 49ms 0.3ms 17.2MB 37ms 0ms wasmtime 31.0.0
wasm 2.rs 66ms 0.5ms 17.0MB 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 283ms 4.4ms 40.1MB 270ms 0ms zig 0.14.0
zig 2.zig 331ms 3.8ms 6.0MB 320ms 0ms zig 0.14.0
wasm 2.rs 400ms 1.6ms 22.0MB 387ms 0ms wasmtime 31.0.0
wasm 1.rs 520ms 6.4ms 56.1MB 507ms 3ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 56ms 2.5ms 10.8MB 47ms 0ms zig 0.14.0
zig 2.zig 81ms 0.9ms 2.3MB 70ms 0ms zig 0.14.0
wasm 1.rs 96ms 1.4ms 27.0MB 80ms 0ms wasmtime 31.0.0
wasm 2.rs 101ms 0.5ms 18.4MB 90ms 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 2227ms 21ms 18.3MB 2210ms 0ms wasmtime 31.0.0
zig 1.zig 2466ms 27ms 2.2MB 2440ms 17ms zig 0.14.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 520ms 1.0ms 17.3MB 507ms 0ms wasmtime 31.0.0
zig 1.zig 569ms 3.4ms 1.8MB 557ms 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 3604ms 8.1ms 16.9MB 3590ms 0ms wasmtime 31.0.0
zig 1.zig 3697ms 9.3ms 1.4MB 3690ms 0ms zig 0.14.0
wasm 7.rs 4908ms 6.3ms 17.4MB 4897ms 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 1.1ms 16.7MB 893ms 0ms wasmtime 31.0.0
zig 1.zig 925ms 2.3ms 1.3MB 917ms 0ms zig 0.14.0
wasm 7.rs 1232ms 0.2ms 16.9MB 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 0.2ms 1.3MB 230ms 0ms zig 0.14.0
wasm 2.rs 235ms 0.3ms 17.0MB 220ms 0ms wasmtime 31.0.0
wasm 7.rs 316ms 1.5ms 16.7MB 300ms 0ms wasmtime 31.0.0