https://jasper-aa64.github.io/tags/loop-optimization/Recent content in Loop-Optimization on JasperHugoen-usMon, 12 Oct 2026 00:00:00 +0000https://jasper-aa64.github.io/posts/loop-optimization/Mon, 12 Oct 2026 00:00:00 +0000https://jasper-aa64.github.io/posts/loop-optimization/A dot-product loop reports “vectorized” at -O3, yet its four additions still wait on each other: floating-point addition isn’t associative, so the compiler won’t reorder it. What loop optimization really asks of you is to spot what blocks the compiler, and to make the changes it won’t make for you.