there are a few possible reasons from what I can gather:
1. We show CPU time by default in ANTS 4 (time only spent executing). ANTS 2 only recorded Wall Clock time so methods which appeared 'slow' due to time spent waiting would be shown. You can easily switch to Wall Clock time in V4 as we record both and you can switch between the two. You might find this article of interest:
http://www.simple-talk.com/dotnet/.net- ... -to-block/
2. We hide insignificant methods by default. If the waiting time isn't included then a 'slow' method might not actually appear much at all. You can uncheck this option from the UI as well.
3. If you are selecting regions on the timeline, if you don't have the right region selected (we can't be 100% accurate here due to Windows not returning perf counters in a timely fashion) so i would try not having anything selected initially to rule out every other possibility.
We removed the Summary. Sorting by the time columns in the All Methods grid will provide you with the worst performing methods with relative ease. We don't have a line level equivalent I'm afraid.
Hope that helps,