Confirm
336
edits
Changes
→Over-invalidation
'''What does it mean''': Over-invalidation means that we're repainting content that isn't changing. This leads to higher CPU usage & bandwidth.
'''Verification Steps''':
* In the Developer menu turn on 'Flash repainted area'.
* Perform all common interaction with the app. Look for areas of the page that are flashing but where the content hasn't changed. Here are some example:
{|
|[[File:Invalidation_demo1.gif|center|frame|Good: GIF invalidates every frame, links invalidates on mouse over because of style change. Static content is not repainted]]
|[[File:Invalidation_demo2.gif|center|frame|Good: When scrolling, new content is painted but it doesn't repaint once on the screen.]]
|-
|[[File:Invalidation_demo3.gif|center|frame|Bad: Clicking repaints the whole page.]]
|}
