[whatwg] window.setInterval if visible.
bzbarsky at MIT.EDU
Thu Oct 15 14:00:29 PDT 2009
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
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