>>Hi Tore,
>>
>>I understand you host the online VFP help site at https://www.vfphelp.com/vfp9/ . Thanks for hosting this excellent resource.
>>
>>I've noticed what seems to me some unusual behaviour. When I visit the site I see a left pane with navigable table of contents, and the right pane shows the contents of the current selection. Initially CPU utilization is very low. This is all as expected.
>>If I navigate the left pane, CPU remains low. However, as soon as I click on any topic CPU jumps up to about 30% on my quad core machine and remains there as long as I have the site open. After the initial page load I would normally expect CPU to drop back down to a low level.
>>I see this in current versions of Firefox and MS Edge on Windows 10.
>>Is this known/expected behaviour? I ask because there is a type of malware which, when injected into a compromised site, causes visitors' computers to mine cryptocurrencies. This manifests as unexpectedly high CPU utilization.
>
>Hi Al,
>unfortunately I am far from an expert on the subject you ask. This "project" is something I have worked with, on and off, over a long time, as a challenge and for fun. I am far from an expert on the subject. I have owned the URL for a long time, it is just a coincident that the name of my website fits perfectly in this case.
>
>First I downloaded the source files from Francis' area at Github, https://github.com/VFPX/HelpFile. Since it's a collection of HTML files, I tried to get it to "work", but it required a lot of changes, mostly to make the folder structure "match", there was a huge number of broken links. But with the help of WW Help Builder and some VFP code that I made myself, I finally made it work.
>
>Why it requires so much processor power, I have no idea. If you want, I can zip all the files into one, and give you a download link, so that you can inspect it yourself.

OK, thanks. I wondered if you already knew of this and a possible cause. If you use any framework to build the site, I also wonder if there could be an update that might address known issues, or if what's being seen is a known issue.

Besides that, if you're happy that the underlying server computer and the web server (e.g. IIS) are updated and secured, then this is really only of academic interest.