Run this in src-tauri:
WEBKIT_DISABLE_DMABUF_RENDERER=1 CARGO_PROFILE_RELEASE_DEBUG=true cargo flamegraph --release
You can leave out WEBKIT_DISABLE_DMABUF_RENDERER=1 if you're not on NVIDIA/Linux
And then run this in the root dir:
yarn dev --port 1432
And then do what you want, and it'll create the flamegraph for you