DavidR
11
Not necessarily as until a shield is used then its level of resource use would be the same. Increasing the sensitivity/heuristics, etc. could mean more scanning requirement and an increase in resource use.
So as SafeSurf said it also depends on an individuals system and other running applications. So a period of running on normal settings and then check how it runs after the increase; for most with a reasonably modern system (CPU and RAM) will probably find little performance hit.