On 16 November 2017 at 22:54, Antoine Pitrou <[email protected]> wrote:
> > Hi Victor, > > Thanks for the answer! > > Le 16/11/2017 à 13:48, Victor Stinner a écrit : > > > > faulthandler has a negligible cost on performance/memory. > > > > For -W default, I guess that your question is the cost on emitting a > > warning: overhead when a warning is displayed, and overhead when the > > warning is filtered. Right? > > -Wdefault means -Wonce or -Walways? If the former, I don't expect many > warnings to be emitted. > Confusingly, neither of these: default, once, module, and always are all different settings. once: once per process (regardless of location) module: once per module (regardless of line) default: once per location (line+module combination) always: every time Still, even with once-per-location behaviour, the warning overhead should be minimal. Cheers, Nick. -- Nick Coghlan | [email protected] | Brisbane, Australia
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