On 10/15/09 4:14 PM, Jeremy Orlow wrote:
I'd imagine that UAs could use an overly conservative metric of when things are visible to make things cheaper if/when this is a concern.
It's a concern any time someone's checking it every 10ms interval invocation. For example, I'm right now looking at a browser window where the check would probably take longer than that (ping time from the X client to the X server is 50ms in this case).
I agree that some mechanism to know when things aren't visible would be very useful.
What are the use cases? Are they addressed by roc's proposal? If not, is an explicit script-triggered visibility check the only way to address them?
-Boris
