Give it a reasonable box. 2 CPU cores, 2 GB of ram.
You are capped at something like 3-5 requests per second, with an average load time of 5 seconds..
Just blows my mind. Simple Java web app on the same server is doing 500 requests per second. Python app, with the horrible gil and all that nasty is going 200 requests per second. And magento is rocking 3 requests per second??!?!?!?!?!
I wonder how much global energy consumption would go down if PHP was not a thing.