It's awesome to see Chrome trying to improve performance for people with many tabs open, which is many of us. I use a LOT of tabs, and the best plugin has been The Great Suspender. Highly recommend it for anyone who wants memory & CPU back and keeps many tabs/windows open at once: https://chrome.google.com/webstore/detail/the-great-suspende...
Leave open the tabs you know you'll need soon(ish) and let the Great Suspender throttle them, and save (then close) groups of tabs/windows you won't need right away using Session Buddy.
https://chrome.google.com/webstore/detail/session-buddy/edac...