[noahtallen]

Not just most of the time — all of the time! JSX is converted to plain JS (react.createElement) before it gets to the browser.

[tuukkah]

Isn't it actually the opposite? Svelte code is compiled to plain JS whereas React has a large runtime.

[Aeolun]

Nah, JSX also gets converted to Javascript. The difference is in that the React runtime re-renders whole components every time something changes, and Svelte is more granular about it even during the compilation step.