LotusScript Profiling
LotusScript agent profiling is not new, but there are still some developers who are not aware of it. It's something I blogged about more than ten years ago. At that time talking about the relative performance of specific API calls, in that case the relative performance of checking .count was greater than zero vs getting the first entry and checking if it was nothing. On other occasions it's also identified mistakes in my code, because it demonstrated more API calls than I expected or needed.
But sometimes it's not a single API call that affects performance, sometimes it's a combination. That's the scenario I came across recently.