Chrome will aggressively throttle background tabs
Hi, this is Alexander. I'm an engineer on Chromium team working on scheduling and on background tab throttling in particular.Firstly, I want to make clear that we are not shipping this in Chrome 56. We have enabled throttling as an experiment in beta channel to measure impact and collect feedback from web devs. We will aim to ship it in Chrome 57, subject to further feedback.In response to concerns voiced we will disable aggressive throttling when active websocket connection is present. Tabs playing audio are already unthrottled.We will also consider more signals to use in exempting a page from this throttling: metatag, pinned tabs, permission to show notifications from user. Please leave a comment in the bug (crbug.com/650594) if you have other suggestions.Looking forward to your feedback,
Alexander.