Programming Language and compiler
Benchmarks

Swift 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
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
swift 1.swift 2555ms 26ms 53.8MB 2523ms 20ms swift 6.1.2

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
swift 1.swift 232ms 3.0ms 11.9MB 220ms 0ms swift 6.1.2

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2480ms 2.8ms 5.5MB 2470ms 0ms swift 6.1.2
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
swift 1.swift 214ms 2.6ms 5.5MB 207ms 0ms swift 6.1.2
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
swift 3-m.swift 146ms 1.6ms 21.0MB 433ms 3ms swift 6.1.2
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
wasm 1.rs 31ms 0.6ms 18.0MB 20ms 0ms wasmtime 33.0.0
swift 3.swift 38ms 0.4ms 14.4MB 33ms 0ms swift 6.1.2

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2.4ms 0.2ms 5.9MB 0ms 0ms swift 6.1.2
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
swift 2-m.swift 1326ms 10ms 74.3MB 4847ms 33ms swift 6.1.2

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 2-m.swift 249ms 1.6ms 60.1MB 660ms 27ms swift 6.1.2

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 7.swift 343ms 1.2ms 10.1MB 333ms 0ms swift 6.1.2
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
swift 7.swift 39ms 1.3ms 10.3MB 30ms 0ms swift 6.1.2
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

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
swift 1.swift timeout 0.0ms 7.1MB 4920ms 67ms swift 6.1.2

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
swift 1.swift 1831ms 3.2ms 7.0MB 1813ms 0ms swift 6.1.2