Make sure it's not being scanned twice. We had a lab where the virus scanner was running on read and write, and then read again of the just generated and scanne

Make sure it's not being scanned twice. We had a lab where the virus scanner was running on read and write, and then read again of the just generated and scanned object files. Switching so that it scanned at either read or write took the builds from 45 minutes down to 10-15 minutes (they also had purchased crappy slow spinning disk hard drives which introduced its own bottleneck, SSDs or even faster spinning disks would have made a world of difference too).