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> It powers many many websites including Youtube.

And this was such a scalability problem that Youtube decided to spend the unimaginable amount of pain and suffering to rewrite in C++.

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I partially agree with your statement. Writing anything in C++ would cause _unimaginable_ amount of pain and suffering. Better way is to isolate slow CPU heavy stuff and write it in C without suffering.

That's certainly an opinion that C fundamentally makes things easier to write than C++, but not one held by Google in general.

A major problem with scalability at Google is that the CPU heavy stuff has often already been isolated and what is actually needed is a sort of ambient performance rather than just focusing on hot loops.

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