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by yoklov
3838 days ago
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Autovectorization is hard and fragile in the best of times -- tight stable loops with no (or few) branches and little/no memory access that may be aliased, etc. For a dynamic language JIT this is pretty much infeasible (as I understand it). Every loop might have branches for guards/bailing out due to deopts, and at least in JS, TypedArrays are allowed to alias eachother. |
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