Exploring techniques that may allow us to infer the language used to write WebAssembly modules for the 2022 Web Almanac WebAssembly chapter.
NOTE: The wasm module analyser used by the HTTP Archive crawler is found in the wasm-stats repo. The purpose of this project is to rapid-prototype various approaches. If it is considered viable, it will be folded into wasm-stats.
First most recent catalogue of wasm modules is found in downloader/wasm-urls-April-2022.csv. This can be used to download the wasm modules as follows:
% mkdir wasm
% cd downloader
% npm i
% node index.mjs
====---------------------------
This will download ~1200 unique wasm modules, with filenames based on their hashed contents. It also writes a file results.csv which maps URLs to the hashed filenames
The analysis is performed by a simple Rust application, which mostly just interrogates exports / imports.
% cargo run
[...]
{Rust: 155, UnknownCompressed: 405, AssemblyScript: 140, Go: 30, Emscripten: 407, Unknown: 72}
6% unclassified