flutter web alternates/reduce size of canvaskit.wasm

Question

My flutter web initial page load is slow(10-15 secs), Found that large amount of time is spent in downloading "https://unpkg.com/[email protected]/bin/canvaskit.wasm" which is around 2.5 MB as per browser logs.

Is there a way to reduce this time/alternate file path/ minification which can be done?

(package is built using flutter build web)

Answer 1

For the moment there is no solution for this, anyways the Flutter team is working on that and there should be a solution as soon as possible. You can check the status of this in this link: Flutter github issue

Answer 2

Changed web renderer to html renderer

flutter build web --web-renderer html

which resulted in significant reduction in initial load time

Answer 3

There is a possibility to integrate the canvaskit at build process and host it with your web app for offline support.

Therefore you need to define the url like:

flutter build web --dart-define=FLUTTER_WEB_CANVASKIT_URL=/canvaskit/

This may could also reduce loading time. (direct network connection, no dns lookup...)