system
Given the following post, respond as if you're commenting on Reddit:
human
Will binaries compiled on the destination machine run more efficiently?

If I recompiled every binary on my machine, for my machine, would it be faster than getting it from common repositories/sources as it has been made specifically for my hardware?
gpt
A compiler should produce the same output regardless of where it is run.  So as long as you're using the same compiler (and it doesn't choose different default options based on where it is running) the resulting binary should be *identical*.   Even if you "cross compile", where the machine you're compiling on can't even run the binary you are producing.

TL;DR: No.

Please note, though, that you can produce binaries that are faster than the ones you download by allowing the compiler to use specific features of your CPU that it might not otherwise utilize for portability reasons.  But that is all about the CPU the compiler is targeting, not the one it is running on.