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[Python-Dev] PEP 563: Postponed Evaluation of Annotations

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On Sun, 5 Nov 2017 20:18:07 -0800
Lukasz Langa <lukasz at langa.pl> wrote:
> 
> Interestingly enough, at Facebook we found out that using f-strings is *faster* at runtime than the lazy form of logging.log("format with %s and %d", arg1, arg2), including for cases when the log message is not emitted.

I suspect this depends on how complex your f-strings are (or the
interpolated data).

Regards

Antoine.

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