Bug 168482 - Very slow composite (~300ms) when rendering images over 6K px in width
Summary: Very slow composite (~300ms) when rendering images over 6K px in width
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Images (show other bugs)
Version: Safari 10
Hardware: Mac OS X 10.11
: P2 Major
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-02-16 16:29 PST by Yuriy Nemtsov
Modified: 2017-02-16 21:35 PST (History)
3 users (show)

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Description Yuriy Nemtsov 2017-02-16 16:29:42 PST
When adding (16 in the test below) images that have a width and height of 6k px, and then scrolling the container, the scroll will be very laggy. Timelines show that Composite duration was about 300ms.

The issue can be seen in the following jsFiddle:
https://jsfiddle.net/nemtsov/ad8a5ugz/