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.
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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.