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Facebook uses LTO/PGO for C++ pretty broadly.

• jeffbee 2y ago
  Yeah they just never hired me. They also invented BOLT. I think there is a valley in terms of organization size where you have tons of engineers but not enough to accomplish peak optimization of C++ projects. These are the orgs that are spending millions to operate, for example, the VERY not-optimized packages of postgresql from Ubuntu, in AWS.
  • spookie 2y ago
    Well, Ubuntu isn't really a good project to look up upon :) Hell, their latest upgrade broke one of their flavours. Not to mention how fragile their installer is.