Benchmarks

This repository contains JavaScript and WebAssembly benchmarks.

WebAssembly Micro Benchmarks (WasmMicroBench)

This folder contains pre-compiled WebAssembly micro benchmarks from two sources:

.c files

If you wish to update the .wasm file, setup the Emscripten SDK, edit the accompanying .c file and then compile it with the following command:

emcc [benchname].c [compiler_options] --std=c23 -sSTANDALONE_WASM --no-entry -o [benchname].wasm

Replace [compiler_options] with options such as -o2 -g0. You should leave a comment in the .c file indicating what compiler options you used.

For example, with the call-03-args microbench:

emcc call-03-args.c -O2 -g0 --std=c23 -sSTANDALONE_WASM --no-entry -o call-03-args.wasm

To add a new microbench from a .c file:

1. Copy WasmMicroBench/WasmTemplate.c and rename it to what you are testing
2. Insert your microbench code into the run_benchmark funtion.
3. Specify your compiler options.

You may find it useful to use WebAssembly Binary Toolkit, particularly wasm2wat or wasm2c, to ensure emcc isn't optimizing away the code you want to test (e.g. inlining functions when you're testing the call instruction)

.wat files

If you want to benchmark a specific instruction sequence, you can write a WebAssembly Text Format (.wat) file and compile it to Wasm with the wat2wasm tool from the WebAssembly Binary Toolkit.