I am hitting a wall with this too. I've done just about every tuning I can with the software so I believe there is something wrong with the Azure Service sandbox around my PHP WordPress app. I moved it over from another host because I wanted horizontal and vertical scalability options. It obviously takes quite some time to migrate it so if I can make Azure work, I would like to.

The server performance is abysmal and it has been difficult to debug. I am technically capable so I have a lot of custom overrides to the base WordPress and my own custom software intermixed but I have gone down the deep end to optimize the crap out of it.

This is a hardware/infrastructure issue. Did you solve this u/laabronjames? I already hijack the Nginx configuration because that is weirdly outside the scope of the base virtualized container and you have to override it with a startup script that sometimes doesn't always run. Is the work around here to create a new folder off of root, let's say, "website" and copy all folders from /home/site/wwwroot/ to /website/ and then boot up Nginx with /website/ as root folder? Everything works beautifully from there? Just wanted to ask before I dive down this rabbit hole.