I saw this benchmark on hacker news, it doesn't run at all in safari and seemingly due to some web assembly error as it isn't simply blocking safari by name: https://jott.live/markdown/javascript_vector_addition
> Cannot run SIMD on this browser. Please try Chrome or Firefox (or refresh to try again) Wasm SIMD is not supported in JavaScriptCore yet.
*** This bug has been marked as a duplicate of bug 222382 ***