Web Interface on the Raspberry Pi

I have a web application that I developed for use on a Raspberry Pi written in Python and hosted on nginx. It's a bit slow to serve new pages, even when there is very little to no logic being processed for the page that's loading (4-5 seconds+).

I know that's a common problem as Pi's aren't exactly equipped to handle the load required to deliver web pages super quickly, but I was wondering if anyone had any experience with this and if it would be worthwhile to recreate the app in some other environment? I was wondering if perhaps a nodejs server would be significantly (a few seconds) quicker in general, or building a single page application using react would be worthwhile? Or if there is some other solution that would be even faster?