In this documentation page, it is stated that in order to profile a page, you just need to add ?enable-tideways to your URL and then head to http://xhgui.vvv.test/ to view the profiling results.
This didn't work for me as, by following @tomjn advice, I had to add ?enable-tideways=1 to my URL instead.
If this is the way it is supposed to work I can provide a PR with this documentation change, while also fixing a typo and also adding a note that in order to use tideways profiling, you also need to have xdebug_off.

Otherwise, if ?enable-tideways is also supposed to work, then this needs to be fixed here.
What do you think?