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> More generally, it's not clear to me that there was any technical benefit to the rewrite in the first place

> but numbers like those seem far more likely to be the result of other changes than the language shift.

Which one is it?

Just saw this now. The two aren't remotely in conflict. The _rewrite_ (from zig to rust) almost certainly didn't result in the performance improvements they're claiming, because rust and Zig are roughly equivalent in that regard. We know that they included other changes with the 1.4 release (in other words, 1.4 is not just 1.3, but in rust this time), so it's far more likely that those changes are responsible, not the rewrite.

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