Re: [webkit-dev] Preferred style for checking for undefined in our built-in JavaScript code?

FWIW, performance seems to be equivalent: http://jsperf.com/typeof-vs-undefined-check/39 Chris https://chrismatic.io/ > On Nov 30, 2015, at 1:01 PM, Geoffrey Garen wrote: > > For the time being, I like “x === undefined”. > > Long term, I’d like us to switch to “x === @undefined”. > > We use @ to

[webkit-dev] High web process CPU usage

Hi all, In the Safari shipped with the latest macOS Sierra beta, as well as Safari Tech Preview 9, there's an odd CPU usage issue with individual tab's web processes. For example, if one navigates to huffingtonpost.com , Activity Monitor will show the tab web process