In order to save our users’ batteries and data plans, and provide them with a good experience on the web, Chrome will limit the resources a display ad can use before the user interacts with the ad. When an ad reaches its limit, the ad's frame will navigate to an error page, informing the user that the ad has used too many resources.
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To determine the threshold limits for the unloading, we extensively measured the ads Chrome sees. We targeted the most egregious ads, those that use more CPU or network bandwidth than 99.9% of all detected ads for that resource. Chrome is setting the thresholds to 4MB of network data or 15 seconds of CPU usage in any 30 second period, or 60 seconds of total CPU usage. While only 0.3% of ads exceed this threshold today, they account for 27% of network data used by ads and 28% of all ad CPU usage.
From the blog post:
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I wonder if these thresholds will be adjustable? Though, I suppose anyone who has already installed an ad blocker won't care.
That was my thought reading this post too. It sounds like the answer is no, but I'd certainly make it more aggressive if I could.