[_gabe_]

I'm not OP, but I don't think the argument is even about rendering. The whole point of SPA, if I understand correctly, is to send the javascript/data and then dynamically create the web page client side (with minimal updates when data changes). Javascript is fast, but a server can dynamically generate HTML in any language. Most server side languages and/or frameworks will be written in faster languages than Javascript. Additionally, you don't need to wait for the browser to deserialize the JS before it can start generating the HTML.

So the benefits of server side generation is no need to deserialize the code that generates the page and locality to the data. I'm guessing these two things are the biggest contributors to the speed ups.

I guess "server side rendering" is a bit of a misnomer, since you're not getting a rendered image, but rather a functional web page. It's possible I've misunderstood the whole SPA vs server side rendering arguments as well and my entire argument is invalid ¯\_(ツ)_/¯

[Scarbutt]

Most server side languages and/or frameworks will be written in faster languages than Javascript.

Lots(most?)of server side apps are python, ruby, php or javascript.

[_gabe_]

In the Stack Overflow survey it looks like the top 8 frameworks are all JS, C#,and Java. Flask, Django, Laravel and RoR start coming in after all these frameworks. So it looks like most server side apps are either JS or something faster like C# or Java.

Also this is if you check professionals. It's pretty similar for all respondents, but Flask and Django rise above spring and ASP.NET, although ASP.NET Core is still above those.

https://insights.stackoverflow.com/survey/2021#section-most-...