As of bug 1252170, we disable spotlight indexing of the objdir. This /should/ cause no Finder CPU explosion during builds because of objdir indexing. The FINDER_SLOW_MESSAGE in python/mozbuild/mozbuild/mach_commands.py should at least be tweaked. I'm tempted to remove Finder CPU monitoring all together. But the code is there and it could potentially catch issues in the wild. Perhaps we could add some build system telemetry to see how often it is alerting :)
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