Show a loading bar while stage requests are being performed

I recently came across a task that would take a very long time to execute when performed on 1000+ rows at once, not because of the task itself, but because the context was being performed for each row and taking some time. Luckily I could find a way to improve the context, so the wait time is down from minutes to a couple of seconds, but still I think in those couple of seconds to users it might appear that the application is unresponsive and it would be good to show a process is running when a task is being staged.