"I'm sure Google does these days, though when I was there PGO wasn't widely used". Yes it was. Maybe you didn't know, but it was. "and Chrome is one of the mo

"I'm sure Google does these days, though when I was there PGO wasn't widely used". Yes it was. Maybe you didn't know, but it was. "and Chrome is one of the most intensively optimised apps out there. " This isn't really true actually. So if that's your counter-argument, ... "So I think it's fair to say that most C++ apps built by mere mortal companies probably still don't use it" No, it isn't :) Really. So far you've cited one example of someone being late to the party. " But I'd be keen to see data showing I'm wrong." What form do you want it to take?