9to5Google reports a future version of Google's Chrome browser will block ads that consume too many resources. The search giant says it will block adds that are "too heavy", meaning they either use too much network or CPU resources. The goal here is to improve the browsing experience, to ensure buggy scripts don't hang websites.
Judging from a work-in-progress Chromium commit, the Chrome team may be expanding on this effort with a new blocker that targets ads that use too much network or CPU, or, as Google calls them, “heavy ads.” The commit message shares some specifics on what it currently takes to trigger this blocker, but notes that these numbers are subject to change at any time.
This intervention unloads ads that are in the .1% of bandwidth usage, .1% of CPU usage per minute, and .1% of overall CPU time. The current numbers are 4MB network and 60 seconds CPU, but may be changed as more data is available.