On Thu, 22 Oct 2020 at 12:52, Mark Shannon wrote:
Getting a PGO/LTO comparison against 3.10 is tricky. Mainly because I'm relying on merging a bunch of patches and expecting it to work :)
However, on a few simple benchmarks I'm seeing about a 70% speedup vs master for both default and LTO configures.
I would expect a lower speedup on a wider range of benchmarks with a PGO/LTO build. But 50% is definitely achievable.
Apologies if this is already mentioned somewhere, but is this across all supported platforms (I'm specifically interested in Windows) or is it limited to only some? I assume the long-term expectation would be to get the speedup on all supported platforms, I'm mainly curious as to whether your current results are platform-specific or general. Paul