No, not normal. 5,000 caches renders in a few seconds. On my system it's about two seconds for the initial render, and zoom/pans are pretty much instantaneous. Do you have the text labels enabled? They really slow things down, turn them off. I also suggest leaving clustering at its default value. It's that way for good reason!
(Note: this is for the markers. The map tiles themselves vary depending on the map style chosen. Google/Bing will always be the quickest. Others are much slower.)
(Note: this is for the markers. The map tiles themselves vary depending on the map style chosen. Google/Bing will always be the quickest. Others are much slower.)