[Webkit-unassigned] [Bug 264235] REGRESSION (Safari 15)?: Appending img elements to the DOM is slow when 1Blocker is enabled

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=264235

--- Comment #8 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Sorry I was going to give more instructions once you said sampling was OK.

WebKit uses a multi-process model so you need to find the appropriate web content process using Activity Monitor or `top` (quit Mail and close other Safari tabs to reduce the count). You can see which is the right process by looking to see which com.apple.WebKit.WebContent process uses CPU when interacting with the page.

Then run `sample` with the PID of that webcontent process, while doing the image loaded.

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