The "hot loop" is also a myth. Very few programs actually have a hot loop with larger-than-average returns on optimizations. Heck, the blog post itself is an ex

The "hot loop" is also a myth. Very few programs actually have a hot loop with larger-than-average returns on optimizations. Heck, the blog post itself is an example of that not being the case - it's startup that's slow, not the program's steady state hot loop. For something you actually spend a significant amount of time using continuously, yeah maybe it has a hot loop. But even then, probably more like hundreds or thousands of hot loops depending on the features being used, what stage the program is in (eg, blender while editing the scene is very very different from blender while exporting a rendering).