3 ms·
For the same reason people use icc, it generates faster code. A couple of years ago I compiled part of the application I was building for power8. The perf was
by StillBored 7y ago
For the same reason people use icc, it generates faster code.
A couple of years ago I compiled part of the application I was building for power8. The perf was pretty bad, so I rebuilt parts of it with xlc, and it was literally over 2x faster. That made the machine competitive/faster than the x86's we were using.
Now GCC/clang have bee getting better and the gap with icc is nearly closed. I'm not sure how much of that applies to xlc, but i'm betting there hasn't been nearly as much work optimizing for POWER as there has been for arm and x86.