I have a unit tests which uses a library that is configured to output
debug messages on the console. I have a temporary test that writes quite
a lot of output - we're talking about 20'000 lines.
If I run the test in TestDriven, the whole test (which imports data of
5000 records) takes about 2 minutes. In the unit test runner, it's been
running for 20 minutes now, using a full CPU core and I can't even shut
it down - I'll have to kill my devenv-process and restart VS again. The
debug window is still being updated (so the test runner does not hang),
with an interval of about 1 line per second.