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by marginalia_nu
605 days ago
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While the compiler is decent at producing code that is good in terms of saturating the instruction pipeline, there are many things the compiler simply can't help you with. Having cache friendly memory access patterns is perhaps the biggest one. Though automatic vectorization is also still not quite there, so in cases where there's a severe bottleneck, doing that manually may still considerably improve performance, if the workload is vectorizable. |
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