[Webkit-unassigned] [Bug 260458] New: Massive performance regression on TP176

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=260458

            Bug ID: 260458
           Summary: Massive performance regression on TP176
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mic.gallego at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 467357

  --> https://bugs.webkit.org/attachment.cgi?id=467357&action=review

Performance issue

Hi,

I am not sure if the issue is on TP176 or earlier, but after testing one of our theme, I have near unusable performance on Safari (everything is butter smooth on other browsers). Here is the page you can play with:

https://prestige-new-version.myshopify.com/collections/all (the first time a password will be asked, enter rewblo as password, then go back to the listing page). As you scroll through the products you will experience massive lag. I am aware of the forced layout but those are unavoidable to have one of the feature we need, and it does not cause such issue on other browser nor older versions of Safari.

Thanks! :)

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