See my update to the comment. Its memory footprint is greater than I expected. I shan’t pursue it any further at present, I was mostly just curious to get an initial feel for it. Taking it (or something like it) to a polished product is something I’d like to do, but I’ve got other, much more important things to do on FastMail and Topicbox, and I don’t think anyone else in the company feels strongly about it, so it’s unlikely to ever actually happen.
One avenue would be to use a different, more light-weight engine; https://github.com/zserge/webview, for example, can use the local platform’s engine, which is likely to be somewhere between a little and a lot more efficient than Electron/Chrome. Running FastMail with the MSHTML renderer via the Rust bindings for that (DPI scaling issues, but meh), it starts at about 60MB but is easy to get over 80MB with some use. Still quite a lot less than Electron/Chrome.
One avenue would be to use a different, more light-weight engine; https://github.com/zserge/webview, for example, can use the local platform’s engine, which is likely to be somewhere between a little and a lot more efficient than Electron/Chrome. Running FastMail with the MSHTML renderer via the Rust bindings for that (DPI scaling issues, but meh), it starts at about 60MB but is easy to get over 80MB with some use. Still quite a lot less than Electron/Chrome.