Translation to Part of Full Highly Optimised WebAssembly Code

[sirinath]

WebAssembly can be more efficient than JS.

So is it possible to support highly optimised (as per #4657) WebAssembly output instead of JS for additional performance gains where possible also converting some of the linked JS again when possible? The amount of WA as WA improves with features like GC the code can be 100% translated into WA.

[myisaak]

Webassembly might harm startup costs, with the engine compiling and loading the wasm file.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[gtm-nayan]

WASM is a lot slower than JS for webpage UI at the moment because it doesn't have a native way to interface with the DOM API. Even when/if that is resolved at some point, just compiling the template will not grant any performance benefits because of the overhead from interfacing with the rest of your code. And general purpose JS to WASM compilation is out of scope for Svelte for the forseeable future.