Does having a mirrored thunderbolt display use more cpu?

In a multiple display setup, if one of the displays is mirroring another because it is in another room for example, does it add more strain to the CPU, even though it is only duplicating the same image as the desktop display?

In a multiple display setup, if one of the displays is mirroring another because it is in another room for example, does it add more strain to the CPU, even though it is only duplicating the same image as the desktop display?

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    Thunderbolt ports and displays: Frequently asked questions (FAQ) - Apple Support
    If you are using just a single external display and still having issues, you may find the troubleshooting steps outlined in the this article helpful:
    Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
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