Originally posted by gganesh
View Post
Im on CachyOS(archlinux), Kernel 6.0.9 got compiled
Config: https://paste.cachyos.org/p/fd6becb.9-2-cachyos-lto
CPU: 5900X
Clang 14, 15 and 16 are working correctly on the same source.
And because the performance of the compiler itself:
AOCC
Till the point where the compiler failed to compile the kernel:
```
Executed in 23.25 mins fish external
usr time 480.67 mins 131.00 micros 480.67 mins
sys time 23.72 mins 112.00 micros 23.72 mins
```
Clang-15 compiled with ThinLTO, PGO and optimized with BOLT Source:https://mirror.cachyos.org/llvm-bolt-15.tar.zst
I stopped the compilation at the point where AOCC failed:
```
__________________________________________________ ______
Executed in 594.25 secs fish external
usr time 180.36 mins 200.00 micros 180.36 mins
sys time 19.06 mins 90.00 micros 19.06 mins
```
How it can be that a compiler is that much slower?
Regards
Peter Jung
Comment