LoadFromCacheOrDownload is sensibly slower than WWW, why?

Questions & Answers
1

I noticed that LoadFromCacheOrDownload is noticeably slower than WWW when loading assets from the LAN, what is this overhead due to?

Of course the difference is less noticeable when the assets are loaded from the Web, but it becomes relevant again if the assets are cached!

2

LoadFromCacheOrDownload has obviously an internal overhead somewhere.