petehunt / rust-benchmark

Benchmark of native Rust, Rust compiled to JS and "native" JS

Unscientific, half incorrect unrepresentative benchmark of Rust compiled to JS.

Setting up

Install rustup and run:

rustup install nightly
rustup override set nightly
rustup target add asmjs-unknown-emscripten
rustup target add wasm32-unknown-emscripten

And install emscripten:

curl -O https://s3.amazonaws.com/mozilla-games/emscripten/releases/emsdk-portable.tar.gz
tar -xzf emsdk-portable.tar.gz
source emsdk_portable/emsdk_env.sh
emsdk update
emsdk install sdk-incoming-64bit
emsdk activate sdk-incoming-64bit

Build

Build native:

cargo build --release

Build asm.js:

cargo build --target=asmjs-unknown-emscripten --release

Run the benchmarks

"Native" JS:

node sort-benchmark.js

Asm.js:

node target/asmjs-unknown-emscripten/release/sort-benchmark.js

True native:

target/release/sort-benchmark

Results I got on my machine

[petehunt@petehunt-mbp sort-benchmark{master}]$ node sort-benchmark.js
Sorted 500000 ints in 142 ms
[petehunt@petehunt-mbp sort-benchmark{master}]$ node target/asmjs-unknown-emscripten/release/sort-benchmark.js
Sorted 500000 ints in 134 ms
[petehunt@petehunt-mbp sort-benchmark{master}]$ target/release/sort-benchmark
Sorted 500000 ints in 40 ms