Excessive heat (on mbp)

hi devs, I’m using GP v2.8.5 build 2179 on MacBook Pro (Retina, 13-inch, Early 2015) on OSX v10.12.5 and I noticed my lap getting really warm after 30 min to hour. Closed GP and things cooled down. Any ideas? Thanks.

Is it reproducible with all projects or with just a single one?