Very slow P123 web page

Over the last weeks (or perhaps longer) the P123 web page has become so slow that it’s borderline unusable for me. Occasionally the speed goes back to normal (normal: sub 2 second loading time for any part of the site), but most of the time it takes >10 seconds to do anything. Simply reloading www.portfolio123.com takes between 15 and 20 seconds. Any other web page on the internet uses less than 2 seconds to load for me, streaming 4K video works great, it is only portfolio123.com that for some reason is slow. I seem to be the only user with this problem, no one else is complaining, could there be an issue with my account?

The feeling I get trying to run simulations is that the underlying model performing the calculations (ranking etc) works fine, it's the web-interface that for some reason is really struggling.

Any advice? Anything I can try on my end? Anything you can check on your end?

(Some further testing shows that the problem is on my side, nothing wrong with portfolio123.com)

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