[torginus]

Honestly React has no excuse for being this slow - this style of immediate gui it uses was championed by video games, and Dear IMGUI is still doing well in that space.

I think it's worthwhile to compare the 2 - I'm sure one of the major contributors of React's slowness is the crazy amount of objects it generates triggering GCs - desugared jsx code turns into building up the React DOM with React.createElement

There's no reason why they couldn't have just done what Imgui did and each createElement would be a function call, that doesn't need to allocate. Considering the js API is not something most devs use, most folks wouldnt mind if it got replaced.

State management is also another issue - considering React has had a compiler due to jsx since the outset, not using that since the beginning to do a little data flow analysis and figure out which piece of state affects what UI elements is just criminal - an further exacerbates the waste in other parts of framework, by running already wasteful code more often than it needs to.

Tbf, they already fixed the compiler issue with the latest React, but only as a reaction to getting destroyed by Svelte on the performance front.

Just goes to show, that if you don't have competition, there's no guarantee positive change will happen on any time scale no matter the resources you throw at the problem.