In Moodle 3.3 we are getting issues with long times to refresh the page when clearing cache or saving admin settings. It seems to affect all boos-based themes. Specifically we are concerned with Fordson on Moodle 3.3 but we noticed quite a big difference in refresh times with Boost and several child themes as well.
Commenting out the following lines seems to help dramatically but we loose the icons obviously.
Is this just how things are going to be or are we doing something wrong with the themes?