From Build to Running Tests

Pricing per core hour, assuming 1 core = 2 “vCPU” and 4GiB RAM.

Container services
hyper.sh - $0.055, 10 second minimum
Amazon Fargate - $0.152, 1 minute minimum

VM services
GCE preemptible VM - $0.01772, 1 minute minimum
Amazon m5.large spot - $0.0163, 1 minute minimum

So far it looks like the preemptible/spot VM services are much cheaper, and they have low granularity billing these days. Is there a “preemptible container service” anywhere? How long will it take to boot VMs on the latter services?