According to Tauri's documentation (https://github.com/tauri-apps/tauri) minimal app:

                                    Tauri   Electron

    Memory Consumption Linux        180 MB  462 MB

Note Tauri is full fledged Client/Server with WebView (client) running in separate process with RPC between UI process and Rust code (Server).

For the comparison:

Standalone Sciter (scapp.exe, https://github.com/c-smile/sciter-js-sdk/tree/main/bin) takes ~8 MB of RAM (with minimal Cairo and GDI backends).

That's 20 times less than even Tauri.

WebView based solutions are not suitable for applets - small portable desktop applications.