Just when I thought that surely a single SIMD dot product instruction must be the fastest way to calculate a damn dot product on a processor, agner fogs instruction tables come flying out, hitting me over the head telling me that manually calculating a dot product may actually be faster sometimes

Why must computers be like this?

I just came out of a bad relationship with hardware rasterization being horribly slow and now I can't even trust my processor to do things properly

This is how people develop trust issues