Apologies for the delay in responding:

Tom Roche Sun, 1 Apr 2007 15:49:56 -0400
>> Has someone successfully used JUnitPerf with JUnit4 test classes?
>> [... Previously] I posted the JUnitPerf list

>> http://tech.groups.yahoo.com/group/junitperf/message/86

>> because it seemed to be the place to ask (am I missing something?)
>> despite the fact that Mike Clark hasn't posted there in over a
>> year. The next day, someone else posted a similar question

>> http://tech.groups.yahoo.com/group/junitperf/message/87

>> though asking about LoadTest as well. So if you've got examples of
>> how to run a LoadTest or TimedTest (especially the latter :-) under
>> JUnit4, please reply to me, to junit@yahoogroups.com, to
>> junitperf@yahoogroups.com, or all of the above.

David Saff Thu, 5 Apr 2007 11:55:06 -0400
> JUnit 4's extension mechanism is very different from JUnit 3's.
> Probably, to do what you want would require a new custom runner.
> Where is the information on how long each timeout should be coming
> from?

Java Preferences. Further details in

http://tech.groups.yahoo.com/group/junit/message/19139

and the RFE

https://sourceforge.net/tracker/index.php?func=detail&aid=1687449&group_id=15278\
&atid=365278