3 ms·

There is a lot of cargo culting in the -O2 decision. But it also true that O3 enables a lot of loop optimizations that are not particularly relevant for the ke

There is a lot of cargo culting in the -O2 decision. But it also true that O3 enables a lot of loop optimizations that are not particularly relevant for the kernel. Also the kernel is less reliant of more aggressive inlining and interprocedural optimizations than, say, highly abstracted C++ code.

colejohnson66 4y ago
For sure, -O3 isn't really necessary in the kernel, but saying, "it's so bad that we shouldn't even have a Kconfig flag for it" is a bit extreme