Lately we are migrating our desktop version from Sciter sdk to Flutter. To keep it portable, we need to wrap the flutter desktop app to one single exe. After some investigation, we decided to write our own wrapper with Rust, here we use brotli as the compressor and decompressor, it has very good compression ratio (comprable to xz, but obviously higer than gz), and very good depression speed (better than xz and gz).
https://github.com/rustdesk/rustdesk/tree/master/libs/portable