I wasn&#x27;t really referring to wasm vs JS (which is easy to outperform), but reaching equivalent speed to native, which is the ultimate goal, I&#x27;d hope.  Otherwise you&#x27;re just throwing performance away...<p>But, I was a little quick on the trigger.  It&#x27;s not obvious, but after drilling through the design docs for a half hour.. I found a tentative discussion of how SIMD might be added later (based on some kind extension mechanism).