Comment by codesections

This is a very misleading way to report those results (likely unintentionally). The JS Framework site includes benchmarks for imba-v1.5.2 and svelte-v3.29.4 and reports that they are equally fast (1.04 and 1.05). It shows both as similarly faster than React.

As described in your second link, that benchmark is timing something a bit different – and we don't know how well Svelte would perform on it (I'm guessing fairly similarly, since the overall approach seems similar. But there's no way to know without measuring.)