Am I holding it wrong? Laravel performance on fly.io

[greg]

As you say, shared CPUs are never going to be that impressive. As you work up through their 1/2/4 ladder, the RPS improves accordingly, so that would suggest the CPU is the issue. This post says that you can have up to 16 other users and so you could expect some throttling:

Fly VMs specs

Shared CPUs can have up to 16 other people using the CPU at the same time. This is great for apps that don’t use much CPU at all. When you try and sustain CPU usage on these, however, you will get throttled. Performance CPUs will generally get full access to a CPU. The actual hardware is virtualized out, but here’s what lscpu returns: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian Address sizes: …

However that wouldn’t explain your performance-cpu test. You’d expect that would be much better . Maybe … SSH in to the machine, run htop (or equivalent) to see the processes and then run a slightly longer test to see if you get the expected number of child workers. Not sure.