[rich_harris]

We never made any such claim! In fact, the reverse: https://twitter.com/nsthorat/status/1653890181592653825

In Svelte 3, you had to opt in to running code on updates, using things like the `$:` label. It was designed to be conservative about updating components, unlike virtual DOM solutions that like to update everything unless you opt _out_.

I too am very sceptical of benchmarks — they can certainly obscure more than they reveal at times. But you don't have to take my word for it, or the benchmark results showing that Svelte 5 is faster than every other framework in existence (https://twitter.com/Rich_Harris/status/1688581184018583558) — you just need to understand the different mechanisms in play.