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I suspect that the kernel is one of the only things running on Facebook's servers that they didn't write from scratch. Alexandrescu has mentioned that a 1% spee

I suspect that the kernel is one of the only things running on Facebook's servers that they didn't write from scratch. Alexandrescu has mentioned that a 1% speedup to HHVM saves FB about $100k per year, and at that sort of scale it's pretty easy for reinventing every wheel to make sense.

moron4hire 13y ago
right, so why can't projects like that exiat in their own repository? what keeps HHVM and Facebook tightly coupled?
- pydave 13y ago
  Some of them are. > We already have some of the easily separable projects in separate repositories, like HPHP http://article.gmane.org/gmane.comp.version-control.git/189784 http://article.gmane.org/gmane.comp.version-control.git/1897... Presumably some parts aren't so isolated.