Favour Pentium Pro

[reexre]

Started in '06 (what IS that, like SIXTEEN years ago???); resurrected in '19 (Three years ago), and raised from the dead again in '22????

So what?
Aren't you inerested about speed?

The Pentium Pro was a unique processor in a number of ways, but two things were most important from an optimization sense. First, it supported out-of-order execution, where individual instructions could be dynamically re-ordered by the processor to overcome instruction-level data dependencies. Thus, it is better if the compiler generates shorter sequences of instructions (RISC-style), because these can be better reordered. Second, the Pentium Pro has a stall for certain partial-register accesses. The details are complicated and beyond the scope of this answer, but the important fact is that while the earlier Pentium didn't have these, all modern processors do, so having the optimizer generate code accordingly is a good idea.

Did you know it?

(and no one has ever written anything ..... so what does it bother you?)

it is just one more little piece of information