On Wed, 14 Dec 2011, Jonas Sicking wrote: > On Wed, Dec 14, 2011 at 4:55 PM, Ian Hickson <ian@hixie.ch> wrote: > > On Wed, 14 Dec 2011, Glenn Maynard wrote: > >> > >> The problem isn't the cost of the URL mapping, it's the cost of > >> keeping the backing Blob around. If you drag around Google Maps for > >> a long time, and it used object URLs to load its tile images, it'd be > >> very bad if the browser had to keep every tile graphic around for the > >> lifetime of the page. > > > > Browsers do keep them around for the lifetime of the page, in their > > HTTP cache. > > This isn't true at least for Firefox. We allow resources to be kicked > out of the HTTP cache even if the page that originally caused the > resource to be loaded is still being used. I guess. For pages that are dealing with bazillions of images then it makes sense to have the page discard the blobs once they're no longer in use. But I am very skeptical about an API that makes that happen automatically, because it really makes the API as a whole quite brittle. -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Thursday, 15 December 2011 01:11:13 UTC