For all its popularity, Chrome is also notorious for its habit of consuming a lot of RAM and draining battery life on laptops. Google is continually improving in this area and with Chrome 57 it claims background tabs will be limited to an average CPU load of just 1 percent on a single core.
Google explains the background tab throttling mechanism on its Developers website. According to the post, every background tab has a time budget (in seconds) for how much CPU time it can use to complete a process, and is subjected to time budget limitations after 10 seconds in the background. This budget constantly regenerates, but only at a rate of 0.01 seconds per second.
