Improving scan performance

There are a couple methods by which you can improve the amount of time it takes to perform a scan.

1.  Reduce Connection Timeout - The longer the connection timeout the longer it will take a thread to abort a connection for a non-existing service.  The connection timeout should be long enough so that services don't go undetected, yet short enough so that threads are left waiting too long.

2.  Increase Thread Count - The more threads you have performing a scan the quicker the scan can complete.  Each thread takes up a small amount of CPU and memory so the number of threads should be large enough to provide the best level of performance, but small enough so that they do not take over the system.