You'd have to start by defining some things. Are we talking about AJAX request/response cycles being slow? Are we talking about SSR request/response cycles being slow? What was the app doing, CRUD? Something more interesting?
For reference, the Rails app that I am working on, almost literally right now, is responding to HTTP API requests, performing authentication and resource authorization, creating a background job (or 2 or 3), and posting an event to kafka, in 2-3 ms. This is on my work-issued dev laptop from 2016.
If I start hitting the SSR portions of this same app, I'm getting response times in the 70-80ms range pretty consistently across the 6 or so pages that I just hit to get a quick baseline. No front-end frameworks here. Just turbolinks, ERb, HTML, CSS, and sprinkles of ES6 (served via webpack(er)).
For reference, the Rails app that I am working on, almost literally right now, is responding to HTTP API requests, performing authentication and resource authorization, creating a background job (or 2 or 3), and posting an event to kafka, in 2-3 ms. This is on my work-issued dev laptop from 2016.
If I start hitting the SSR portions of this same app, I'm getting response times in the 70-80ms range pretty consistently across the 6 or so pages that I just hit to get a quick baseline. No front-end frameworks here. Just turbolinks, ERb, HTML, CSS, and sprinkles of ES6 (served via webpack(er)).