Tauri apps don't use the NodeJS runtime. You have to write your app's backend in Rust. Like you said, the NodeJS runtime is tens of MB; if you look at their dem

Tauri apps don't use the NodeJS runtime. You have to write your app's backend in Rust. Like you said, the NodeJS runtime is tens of MB; if you look at their demo app you'll see that it doesn't even break 3MB.