- From: 一丝 via GitHub <noreply@w3.org>
- Date: Mon, 09 Mar 2026 10:51:59 +0000
- To: public-css-archive@w3.org
> TabAtkins: I objected at time b/c Chrome and WK had quirk where we used 3d transform presense as a hint to move to compositing layer. We were going to try and remove it which is why we accepted FF proposal > TabAtkins: Turns out we can't remove. We see a lot of extra paints from things not moving to compositing layer. B/c this is unacceptable amount of lost performance we're keeping the hack for now and may need forever. @tabatkins @dbaron I hope the specification could include additional clarification that for user agents requiring backward compatibility, 3D transforms should not be converted to 2D. This would provide valuable guidance for tools like CSS compressors. Otherwise, it could lead to debates like this [comment](https://github.com/parcel-bundler/lightningcss/pull/1157) here: > but nothing in the actual CSS spec says this is required. -- GitHub Notification of comment by yisibl Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/3305#issuecomment-4022871044 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Monday, 9 March 2026 10:51:59 UTC