Bug 403274

Summary:	High CPu usage with Qtwebengineprocess when playing Youtube videos
Product:	[Applications] Falkon	Reporter:	tromzy
Component:	general	Assignee:	David Rosca <nowrep>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	reuben_p
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description tromzy 2019-01-16 15:58:17 UTC

SUMMARY
Playing a Youtube video makes my CPU usage go up to 50% and makes the whole session sluggish. The Qtwebengineprocess is what takes all the CPU.

STEPS TO REPRODUCE
1. Go to Youtube with Falkon
2. Play a HD video
3. Enjoy slideshow

OBSERVED RESULT
Up to 50% CPU usage on quad core CPU

EXPECTED RESULT
Smooth experience

SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.54
Qt Version: 5.12.0

ADDITIONAL INFORMATION

Comment 1 David Rosca 2019-01-17 09:00:28 UTC

There is no HW video decoding in QtWebEngine.