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Enable This Setting to Stop Chrome From Hogging So Much Memory
chrome://flags/#high-efficiency-mode-available
“Enabled,” then click “Relaunch.” When Chrome restarts, head to Settings, and you’ll notice a new “Performance” tab on the left side of the screen where “Memory Saver” now lives. Click the slider to turn on the feature.
If there are sites you’d prefer Chrome always keep active, you can click “Add” to add them to the list. Any time you return to a tab that was inactive, Chrome will let you know and tell you how much RAM it saved by making it inactive.