[react] HTTP/1.1 Overhead - performance issue

[cstavitsky]

Instrument the performance issue: HTTP/1.1 Overhead (requirement is having a server that doesn't understand HTTP2)

Luca's thoughts

HTTP/1.1 Overhead
I think this is a great issue to showcase in the demo.
I recommend doing the following for this: Find a page with a lot of resources that we can load. Imo the about page is a great contendor for this since we have a bunch of images here - maybe we should even increase the amount of employees on this page a bit so that we’re more likely to run into the performce issue. Next, you need to serve the employee images on a server that only speaks HTTP 1.1. Maybe also make that server slow intentionally. Imo it is fine to run a separate server just for serving these images.
When all of this is set up and the page loads, the page will show the images load very slowly after one another (make sure browser cache is turned off!) and trigger a performance issue like this one. This will also have an effect on certain web vitals (maybe helpful for the web vitals narrative).