Comment by znpy

The instances gathered for setup are absolutely the worst: t3a.micro and t4g.micro.

Such instances share the vcpus, and only get burst of dedicated cpus, then they'll get throttled for performance.

The author should have picked any of the other instances. The bare minimum to make an informed decision should be the c6g.medium or the c7g.medium.

In my experience btw, the c7g family really seems to be closing the gap in single-threaded performance with x86-based instances.