On Mon, Sep 14, 2015 at 4:22 PM, Tim Peters <tim.pet...@gmail.com> wrote:
> > faster > > than CPython can look up the .utcoffset method. (At least for times > > within a few years around now.) A programmer who makes it slower should > > be fired. > > So any programmer who implements .utcoffset() in Python should be > fired? That's the only way I can read that. No, no! I've already conceded that caching UTC offset will probably help pure Python implementations. PyPy folks have established this fact for hash and I am willing to extrapolate their results to UTC offset. I am only trying to say that if we decide to bring a fast TZ database to CPython, pure python tzinfo interface will likely become our main bottleneck, not the speed with which C code can compute the offset value.
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