Yeah if code size is the only metric you care about. The second link is an excellent example of code you do not want a compiler to generate by default. Like, be

Yeah if code size is the only metric you care about. The second link is an excellent example of code you do not want a compiler to generate by default. Like, besides all the well-known performance pitfalls of microcoded instructions, jeczx is unfusable on I think all relevant CPUs, so it’s both an additional uop and an additional cycle of latency over a tst/jz sequence.