iTunes Match Stalling and Slow

About two weeks ago iTunes match started to slow down to a crawl…sometimes not completing matching at all, or taking days to complete. I’ve been an iTunes match customer for many years and it’s always worked fairly well. Is there a problem with the service right now? Are there any troubleshooting tips for resolving this? I’ve already signed out of my iTunes match and iTunes in general, and signed back in to see if I could kick start the process, and the results are the same.