Bug 230973
| Summary: | REGRESSION (iOS 15): Using device pixel ratio degrades performance (2x lower FPS than iOS 14) | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | tjkoury <tjkoury> |
| Component: | WebGL | Assignee: | Nobody <webkit-unassigned> |
| Status: | RESOLVED FIXED | ||
| Severity: | Normal | CC: | dino, djg, florent.masson, kbr, kkinnunen, kpiddington, webkit-bug-importer |
| Priority: | P2 | Keywords: | InRadar |
| Version: | Safari Technology Preview | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| See Also: | https://bugs.webkit.org/show_bug.cgi?id=231658 | ||
tjkoury@gmail.com
The Cesium library (https://cesium.com)performance is halved when using the devicePixelRatio for canvas resolution.
These app:
https://celestrak.com/cesium/orbit-viz.php?tle=/pub/TLE/catalog.txt&satcat=/pub/satcat.txt&referenceFrame=1
runs at 35fps on Chrome 93.0.4577.63 (64-bit), Pop!_OS 20.10 & Windows 10, iPhone 12 Pro Max (iOS 14), iPad 2020 (iOS 14).
Updated this morning on iPhone & iPad, immediate 50% reduction in performance (~17 fps).
| Attachments | ||
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| Add attachment proposed patch, testcase, etc. |
Radar WebKit Bug Importer
<rdar://problem/83692664>
Kimmo Kinnunen
Thanks for the report. I can repro that the app is definitively smoother on iOS 14 than iOS 15.
tjkoury@gmail.com
Any additional information required?
Dan Glastonbury
Fixed in the ANGLE roll https://bugs.webkit.org/show_bug.cgi?id=238171