145465 2015-05-29 13:16:01 -0700 Consider throttling DOM timers in iframes outside the viewport 2015-06-16 11:34:17 -0700 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=98474 https://bugs.webkit.org/show_bug.cgi?id=144718 InRadar P2 Normal --- 146025 1 cdumez cdumez barraclough commit-queue esprehn+autocc kangil.han kling koivisto simon.fraser oldest_to_newest 1098159 0 cdumez 2015-05-29 13:16:01 -0700 Consider throttling DOM timers in iframe outside the viewport for performance and power reasons. Radar: <rdar://problem/20768957> 1098170 1 253910 cdumez 2015-05-29 13:36:59 -0700 Created attachment 253910 Patch 1098187 2 253910 ggaren 2015-05-29 14:40:38 -0700 Comment on attachment 253910 Patch What if the iframe has <audio> or is using the WebAudio API? 1098209 3 cdumez 2015-05-29 15:13:13 -0700 (In reply to comment #2) > Comment on attachment 253910 [details] > Patch > > What if the iframe has <audio> or is using the WebAudio API? First of all, audio would only be a problem here is audio is somehow driven by timers. I don't know if there is content doing this but it seems unlikely to me because there is no guarantee your timer will fire *when* you ask it to. It all depends on the load of the system / browser. Also note that we already throttle timers in background pages and I use the same mechanism here for out-of-viewport iframes. So timer-driven audio would likely already be broken in the case of background pages. If this turns out to be an issue, we could restrict the throttling to cross-origin iframes for example. 1098232 4 253910 commit-queue 2015-05-29 16:02:56 -0700 Comment on attachment 253910 Patch Clearing flags on attachment: 253910 Committed r185012: <http://trac.webkit.org/changeset/185012> 1098233 5 commit-queue 2015-05-29 16:03:04 -0700 All reviewed patches have been landed. Closing bug. 253910 2015-05-29 13:36:59 -0700 2015-05-29 16:02:56 -0700 Patch bug-145465-20150529133644.patch text/plain 15904 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMTg0OTU1CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggY2VkNGM5Mjk1ZTk5NTA2 ZDZlNzcxOTBkODNkMDFjZTExYzIwYzczOC4uZmZkOGUxYmUzZjA3ZTkwYzAwNGJkNDE2NDE2OWY4 Y2E2NmEwM2E3MiAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDU0IEBACisyMDE1LTA1LTI5ICBDaHJp cyBEdW1leiAgPGNkdW1lekBhcHBsZS5jb20+CisKKyAgICAgICAgQ29uc2lkZXIgdGhyb3R0bGlu ZyBET00gdGltZXJzIGluIGlmcmFtZXMgb3V0c2lkZSB0aGUgdmlld3BvcnQKKyAgICAgICAgaHR0 cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE0NTQ2NQorICAgICAgICA8cmRh cjovL3Byb2JsZW0vMjA3Njg5NTc+CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BT ISkuCisKKyAgICAgICAgVGhyb3R0bGUgRE9NIHRpbWVycyBpbiBpZnJhbWVzIHRoYXQgYXJlIG91 dHNpZGUgdGhlIHZpZXdwb3J0IHRvIGRlY3JlYXNlCisgICAgICAgIENQVSB1c2FnZSwgaW1wcm92 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