BitDefender Scanning Activity

I recently inherited management of our BitDefender system. We have about 100 computers with half of them in engineering. I was speaking with one engineer yesterday that does iOS development and he mentioned that BitDefender CPU usage spiked when he was building the app and during unit testing.

I read about live scan, but don't fully understand how it works and what options we have for reducing the impact on processor intensive activities. Does it examine all file creation as it is happening? I am not averse to reading and would appreciate recommendations as well as feedback on this issue.

In my mind the best security and support systems are basically invisible to the user.

Thanks.