dev - slow render of pages in docker dev environment

Dev testing on my current hardware is rather slow while navigating the website in-browser.

I am using `make dev` to run a testing environment, navigating the webpages pins my CPU to 100% and must wait several seconds for any *new* page to load, as in any page that hasn't been previously loaded.


I suspect the following is relevant:
`Running in Fast Render Mode. For full rebuilds on change: hugo server --disableFastRender`

However, a local dev environment run without docker w the same "Fast Render Mode" via `hugo server -D` is indeed responsive in comparison.

Disclaimer: I am running this on a Thinkpad X250 = older hardware. Fedora 36

Any thoughts on:
* Why there is a performance difference?
* How to improve local testing performance via our default `make dev` docker environment?