That's why you shouldn't use slow backend technologies in the first place because you get to the point where you need preformance and it's impossible because your limited by extremely slow runtime you chose initially because it was flashy (not even easier to developer for) when you could have just chosen something better from the start.

Simple crud apps can get by fine with those technologies, but in the future I'd still never use it because you're leaving huge amounts of performance gains on the table for virtually no benefit. I don't buy the argument that javascript is just easier to develop for because it's simply not. The js ecosystem is a disaster.