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# Performances

ws4py doesn’t perform too bad but it’s far from being the fastest WebSocket lib under heavy load. The reason is that it was first designed to implement the protocol with simplicity and clarity in mind. Future developments will look at performances.

Note

ws4py runs faster in some cases on PyPy than it does on CPython.

Note

The wsaccel package replaces some internal bottleneck with a Cython implementation.

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