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macOS runs smoother in clamshell mode


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I have a 2017 15" MBP w/ 16 GB of memory. I used to run a setup of MBP Retina display + external monitor. It worked for awhile until I discovered that the MBP can run in "clamshell mode" (closed lid). Since the switch, I have noticed that the perceived performance of the MBP has improved. Despite running Docker + several IDE instances + a dozen chrome AND safari tabs + slack/discord/matrix client/telegram, the MBP still feels "snappy". I haven't had to reboot in over 1 month. In the past, I would have to reboot at least every week.


Anybody else have this experience? Currently on the latest Catalina version (10.15.7).