On Wednesday, 20 April 2016 at 22:10:53 UTC, Marco Leise wrote:


7% is quite a bit more than any other option like -cpu=native could achieve. If feasible I'd enjoy if ldc2 shipped with a pgo configuration option. If you use the compiler in a lot of edit/compile cycles it will pay off.

This was the use-case I was optimizing for, and so I will add an option to pass a PGO profile to the CMake script :-) Note that it is a 7% improvement in the D part of LDC. The optimizer (LLVM, C++) takes most of the time during compilation and so the overall performance increase is smaller.

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