Sun 07 Jul 2019 02:04:40 AM EDT
53
Sun 07 Jul 2019 02:04:42 AM EDT
42
Sun 07 Jul 2019 02:04:44 AM EDT
41
Sun 07 Jul 2019 02:04:46 AM EDT
40
Sun 07 Jul 2019 02:04:48 AM EDT
39
So, that's counting up to 53 concurrent "cc1plus" processes?
That's really weird, since Blink.ino on my Mac only compiles 28 files (and only 20 are C++.)
My (non-existent) Go programming skills are not up to figuring out how the parallel builds are supposed to be working 
Do you feel up to trying to run arduino-builder from the cli?