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Chrome Should Get 'Extremely Fast' at Loading a Whole Lot of Web Pages (cnet.com)
Chrome is going to get a big speed boost -- at least for web pages you've recently visited. CNET: With a feature called bfcache -- backward-forward cache -- Google's web browser will store a website's state as you navigate to a new page. If you then go back to that page, Chrome will reconstitute it rapidly instead of having to reconstruct it from scratch. Then, if you retrace your steps forward again, Chrome will likewise rapidly pull that web page out of its memory cache. The speed boost doesn't help when visiting new websites. But this kind of navigation is very common: Going back accounts for 19 percent of pages viewed on Chrome for Android and 10 percent on Chrome for personal computers, Google said. With bfcache, that becomes "extremely fast."
Firefox does throttle CPU in background tabs. For a very long time APIs like setTimeout have been throttled aggressively.
There has been quite recent work on using OS APIs to reduce the priority of processes running background tabs: https://bugzilla.mozilla.org/s...
I back this up.
Pi-Hole regularly blocks between 60 - 80% of my internet traffic with daily browsing, and down to about 40 - 50% when I'm working.
It definitely increases browsing speed, page performance, resource usage, etc