On Windows 10, “Eco mode” is an experimental feature available in the Task Manager starting with build 21364. And it is meant to give you an option to reduce the number of resources an app can access to fix high memory, processor, and disk usage.
Usually, you would use this feature when you notice that an app is using a lot of system resources and you want to reduce its consumption to improve energy efficiency and improve performance.
While this is an optional feature, some apps like Microsoft Edge and Google Chrome can automatically show up with the “Eco mode” status. If this happens, the system is automatically testing lowering base priority and using specific power efficiency policies to improve performance and battery life.
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