[tombrossman]

This would be extremely useful data to have and when I last looked I found little to go on. For example, how great would it be to have an extra column on a page like this with cache hit rates? https://cdnjs.com/libraries

Nice to have these free hosted assets, but I suspect that a lot of these are an additional download and not actually cached by the majority of visitors. Just having a rough estimate would be helpful when choosing whether to directly serve an asset or use a CDN.