Bug 134447

Summary:	deviceorientation event - high cpu load
Product:	WebKit	Reporter:	Oleg Isonen <oleg008>
Component:	UI Events	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Blocker
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	iPhone / iPad
OS:	iOS 7.0

Description Oleg Isonen 2014-06-30 10:00:50 PDT

Pure listening to this event with noop handler leads to ~10% cpu load on iphone 5 ios 7. More than that xcode says "Other Processes" consume 50-70% cpu at the same time.

Both levels go down when event listener is removed.

Comment 1 Oleg Isonen 2014-06-30 10:02:55 PDT

Agent string: Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_1 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Mobile/11D201 (358166864)