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A comment on Scaling Mercurial at Facebook. Parent comment

Re:Scaling Mercurial at Facebook by plorkyeran on Tuesday January 07, 2014 @07:01PM (#7020876)
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.
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Re:Scaling Mercurial at Facebook by moron4hire on Tuesday January 07, 2014 @08:31PM (#7021143)
right, so why can't projects like that exiat in their own repository? what keeps HHVM and Facebook tightly coupled?
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Re:Scaling Mercurial at Facebook by pydave on Tuesday January 07, 2014 @09:08PM (#7021241)
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/1897...

Presumably some parts aren't so isolated.

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