Make the save speed the fastest

[okrightall]

Can Rust or WebAssembly be used to speed up webpage saving

[gildas-lormeau]

Before rewriting everything to Rust, could you try to unzip and import the attached settings (via the options page in SingleFile)? Maybe this could be fast enough.

singlefile-settings-2025-11-12T15_26_54.331Z.json.zip

[gildas-lormeau]

More seriously, the main cost when saving a page is DOM manipulation and fetching/inlining resources. Rust or WebAssembly can help when you have pure CPU-heavy algorithms (e.g. image codecs, parsers) with large, in‑memory data, but they don’t have direct access to the DOM or network in a browser extension.

In practice, most of SingleFile’s work is already limited by DOM operations, network latency, not by raw JavaScript execution speed. That means rewriting the core in Rust/Wasm would add a lot of complexity but bring little real‑world speedup for typical pages.