Go

If you're going to pull numbers out of a hat at least provide some evidence, especially evidence based on a comparable workload.

I actually wrote a whole article about this myself: https://alicegg.tech/2023/02/06/4dollar-vps.html

TL;DR: go can handle 1000+ RPS on a ridiculously small server

But creating an order isn't just a request. PHP will also handle 1000 RPS of hello world just fine on a 4 dollars VPS.

Maybe (probably) Go is still faster than PHP, but the hyperbole is being pushed a bit too far here.

And what about the database?