I am running Budgie on Manjaro Linux on a Dell Inspiron 7300 series laptop.
I recently encountered a problem with my CPU heating up to around 80C and fan running constantly. "Top" showed preview_creator using about 63-65% CPU and Xorg using about 73%CPU. I tracked the problem down to Previews Control where "Run Previews" had been toggled on (enabled). I toggled it off and the problem ceased. CPU now running stably at about 50C and fan rarely comes on at slow speed momentarily.
Data returned by "top" and by "sensor" can be seen in my posts to the Manjaro forum. I can send you a link if you require it.