He does have a good point which is that caching when you are running many unoptimised queries is hiding the underlying problem. That said there isnt too much to

He does have a good point which is that caching when you are running many unoptimised queries is hiding the underlying problem. That said there isnt too much to see here other then dont rely on cache to save you and optimise other stuff first since cache might end up hiding the underlying problem making it hard to fix when you do need to.