Bug 196039

Summary: Detect when layers can behave as a stacking container, to reduce layer explosion
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: CompositingAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: koivisto, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Description Simon Fraser (smfr) 2019-03-20 15:37:25 PDT 
In some cases it's beneficial to treat layer as a CSS stacking context even if it isn't one, so that we create fewer descendant compositing layers.

This will involve bringing back code similar to the code I removed in r236424 and r236611.
Comment 1 Radar WebKit Bug Importer 2019-03-20 15:37:43 PDT 
<rdar://problem/49082455>