have you done any benchmarks to compare wasm performance with js? i have been doing some benchmark test cases after a large refactor of my game engine written in typescript that is built entirely on top of shared buffer arrays (using ECS pattern or so it’s called i guess). i’m done benching for a while now and am ok with results but i have also compared my handcrafted quadtree sort/query algorithm with off the shelf rust implementation that matched the test requirements and saw only 30% gain and figured anything lower than that would not be worth the effort assuming rust compiled to wasm is same or slower and never bothered to test compiled wasm because i could not figure out how to share my buffer arrays with the rust code using wasm bindgen fast enough to bother spending more time on more benching lol

I had a fun 2 years where I basically had 800 critical lines of math code that had to be on every platform, one version in the native language of the platform, and one version as performance optimal as possible.

I was absolutely stunned to find that on web WASM ~= JS which altogether weren't far off from a naive C++ stdlib port. I had to make custom data structures instead of using stdlib ones to really get performance significantly different . IIRC my most optimized C++ converted to WASM was about 70% the speed of JS.