Long run time

I am running a dynamic explicit simulation and am experiencing long run times. I am thinking that it is coming down to a few issues:

1. the stable time increment is 8.89e-9

2. 2 distorted elements are involved in surface intersections, where there are a number of interaction properties that these surfaces and elements are involved in. The program identified these as distorted elements and put them in an element set "WarnElemDistorted".

Does the element set "WarnElemDIstorted" do anything? Are these two points likely to be the issue for long run times? How do I fix it?