Programming Language and compiler
Benchmarks

Wasm VS Swift benchmarks

Current benchmark data was generated on Sat Mar 29 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 1813ms 71ms 33.1MB 1793ms 7ms wasmtime 31.0.0
wasm 3.rs 1852ms 15ms 49.3MB 1827ms 13ms wasmtime 31.0.0
wasm 4.rs 1860ms 23ms 33.3MB 1840ms 10ms wasmtime 31.0.0
swift 1.swift 2915ms 17ms 53.9MB 2883ms 17ms swift 6.0.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 5.rs 171ms 3.6ms 19.2MB 160ms 0ms wasmtime 31.0.0
wasm 4.rs 180ms 2.7ms 19.1MB 167ms 0ms wasmtime 31.0.0
wasm 3.rs 180ms 4.1ms 21.1MB 167ms 0ms wasmtime 31.0.0
swift 1.swift 239ms 4.6ms 11.8MB 227ms 0ms swift 6.0.3

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1134ms 3.5ms 19.4MB 1117ms 0ms wasmtime 31.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 80ms 1.6ms 18.0MB 70ms 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 417ms 2.9ms 18.6MB 403ms 0ms wasmtime 31.0.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 115ms 2.0ms 17.9MB 100ms 0ms wasmtime 31.0.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2489ms 22ms 5.8MB 2477ms 0ms swift 6.0.3
wasm 1.rs 4164ms 21ms 16.8MB 4147ms 0ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 213ms 2.3ms 5.8MB 200ms 0ms swift 6.0.3
wasm 1.rs 348ms 2.4ms 17.4MB 337ms 0ms wasmtime 31.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 3-m.swift 135ms 0.8ms 20.7MB 387ms 3ms swift 6.0.3
wasm 1.rs 236ms 1.4ms 17.3MB 217ms 3ms wasmtime 31.0.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 32ms 0.4ms 17.6MB 20ms 0ms wasmtime 31.0.0
swift 3.swift 37ms 0.1ms 18.2MB 30ms 0ms swift 6.0.3

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2.6ms 0.2ms 5.9MB 0ms 0ms swift 6.0.3
wasm 1.rs 6.7ms 0.5ms 17.2MB 0ms 0ms wasmtime 31.0.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 89ms 0.8ms 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
wasm 1.rs 250ms 1.4ms 16.9MB 237ms 0ms wasmtime 31.0.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 48ms 1.8ms 17.4MB 40ms 0ms wasmtime 31.0.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 8.rs 821ms 2.1ms 20.2MB 810ms 0ms wasmtime 31.0.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
wasm 1.rs 927ms 58ms 41.1MB 910ms 10ms wasmtime 31.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 197ms 2.3ms 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
swift 7.swift 346ms 0.4ms 9.8MB 340ms 0ms swift 6.0.3
wasm 1.rs 411ms 2.4ms 17.1MB 400ms 0ms wasmtime 31.0.0
wasm 2.rs 583ms 2.8ms 17.0MB 570ms 0ms wasmtime 31.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 39ms 1.0ms 10.0MB 30ms 0ms swift 6.0.3
wasm 1.rs 49ms 0.6ms 17.0MB 40ms 0ms wasmtime 31.0.0
wasm 2.rs 66ms 1.3ms 17.2MB 53ms 0ms wasmtime 31.0.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 379ms 5.8ms 22.0MB 367ms 0ms wasmtime 31.0.0
wasm 1.rs 511ms 9.4ms 56.3MB 493ms 0ms wasmtime 31.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 96ms 2.9ms 27.1MB 83ms 0ms wasmtime 31.0.0
wasm 2.rs 98ms 0.4ms 18.3MB 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 2218ms 13ms 18.1MB 2207ms 0ms wasmtime 31.0.0
swift 1.swift timeout 0.0ms 7.1MB 4933ms 53ms swift 6.0.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 524ms 3.2ms 17.3MB 510ms 0ms wasmtime 31.0.0
swift 1.swift 1876ms 12ms 6.9MB 1863ms 0ms swift 6.0.3

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3616ms 7.7ms 16.8MB 3603ms 0ms wasmtime 31.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 916ms 7.5ms 16.8MB 900ms 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 3.0ms 16.9MB 3587ms 0ms wasmtime 31.0.0
wasm 7.rs 4896ms 5.3ms 16.9MB 4883ms 0ms wasmtime 31.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 910ms 5.9ms 17.4MB 897ms 0ms wasmtime 31.0.0
wasm 7.rs 1232ms 2.6ms 17.1MB 1220ms 0ms wasmtime 31.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 236ms 2.5ms 16.7MB 223ms 0ms wasmtime 31.0.0
wasm 7.rs 315ms 1.2ms 17.2MB 300ms 0ms wasmtime 31.0.0