Since updating to 2.4 we have some categories with a TTFB of over 2.0 seconds.
After profiling the category pages we found that the Mageplaza/LayeredNavigationPro/view/frontend/templates/type/list.phtml has 35 requests each taking around 400ms.
This 35 figure I imagine is the amount of filterable attributes the category page has.
Even if I disable Mageplaza Layered Nav module even the core list.phtml returns a similar result e.g. 35 requests at about 380ms
Anyone else experienced this? Of course it’s only really an issue with categories that have a high amount of filterable attributes but unfortunately due to what we sell most of our categories have a large number of filter options