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lang-cpp
-O2 -fno-omit-frame-pointeris just as good as-Os. Please check the updated question.-O2,-O3.-O2enables-falign-functions -falign-jumps -falign-labels -falign-loopsis meaningless. Each of these options take a numerical argument. The argument they receive for most target architectures when they are enabled automatically by-O2is not1. Setting them to1effectively disables these “optimizations” that often make the binary code slower.-O3 -fno-align-functions -fno-align-jumps -fno-align-loops -fno-align-labelsinstead of only-O3, my app actually runs faster, and it also decreased the executable file size.