[Webkit-unassigned] [Bug 237235] New: Optimize StyleSharingResolver readonly and inert checks

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=237235

            Bug ID: 237235
           Summary: Optimize StyleSharingResolver readonly and inert
                    checks
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ntim at apple.com

readonly & inert are boolean attributes, the only thing that matters is the presence of the attribute, not its value. E.g. `readonly=false` behaves the same as `readonly=readonly` or `readonly=true`.

This saves getting and comparing values for those attributes, and also allows `readonly=readonly` and `readonly=true` or `readonly=false` to start using style sharing.

Same applies for inert.

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