I did some benchmarks on a Dell Precision M65. The hit from MacAfee was approximately 15-20% by my reckoning, in terms of time taken to run a compile and link

I did some benchmarks on a Dell Precision M65. The hit from MacAfee was approximately 15-20% by my reckoning, in terms of time taken to run a compile and link cycle. Worse still, as you pointed out, responsiveness is affected, which can be incredibly frustrating.