Steps to reproduction:

1. create a method
public void test() {
   long startTime = System.currentTimeMillis();
   while ((System.currentTimeMillis() - startTime) < 20) ;
}
and call it about 100 times
2. set line 2 and 3 as code region (body of the method)
3. invoke code region profiling
Results: it measures cca 60 ms for the first half of invocations and 30 ms for
the second half of invocations

The expected results are 20 ms for most of measurements. It works correctly on
other platforms.