Why Google ported crawlers from Python to C + +

This is a problem a few years ago Quora, a bit outdated, but after looking at the feeling is good, summed up a bit

Original link: Http://www.quora.com/Why-did-Google-move-from-Python-to-C++-for-use-in-its-crawler

1. Google has a powerful C + + library to support distributed systems
2.c++ More stable operation
3. In the current cluster environment, every little bit of efficiency adds up to a lot of benefits
4. The development of Google is not the first place in development efficiency, but more attention to the stability of the program
5. The main bottleneck for crawlers is high concurrency, and Python has insufficient control over the details of high concurrency, at least at the time.

Why Google ported crawlers from Python to C + +