I'm expiriencing very low performance of dotCover. For a unit test (running by mstest) I have 0:27 min with no dotCover used and 3:12 min with dotCover.
When I run the test with MSTest code coverage I get 0:35.
Sometimes difference is even more. I'm also using coverage when running TeamCity build. There I get even more worse result: 1:07 min vs 9:49 min (with dC). Just imagine the impact of using dotCover for ~4000 tests! Terrible.
Is it expected performance loss for dotCover using?