It's not just that modern CPUs are fast in eager mode; also str* and mem* functions nowadays use the FPU (via SSE/AVX) and the dynamic loader (ld.so) uses them.

It's not just that modern CPUs are fast in eager mode; also str* and mem* functions nowadays use the FPU (via SSE/AVX) and the dynamic loader (ld.so) uses them. Therefore Linux's heuristics switched to preloading the FPU anyway for most processes, even before the program code started running.