Partial Performance Profiling

[MikeMoss]

I often find when building a big workflow that I need to cancel its running in order to tweak something, but I still want to know which element was making it slow/crashing the workflow.

What would be useful in this circumstance is for the performance profiling to work even on partially finished (e.g. cancelled) workflows. It could just display a message reminding that this is a percentage of things that have run so far.