I've found recently that about half of my requests have super long response times (~20 seconds). The other half come back pretty much instantly (~200 ms). I can make the exact same request back-to-back, and sometimes it will take forever, and sometimes it will be super fast. Am I being throttled somehow or is there an issue with the web service?
For example, I make a request and get this in the metadata:
then I make it again a few seconds later and get this: