The title is misleading. It should be followed with "...on AWS". It would have gotten less interest that way, and justifiably so.

I would have preferred either an analytic treatment of the subject, or an emphasis on open and free solutions, not what amounts to an advertisement for AWS services and vendor lock-in.

Thanks for your the comment. The big majority of serverless users nowadays are on AWS. It might change in the future (probably not), but today the most relevant information regarding latency between serverless functions is due to Lambda and AWS services. I am not working in AWS, and my company serves both AWS customers and other cloud vendor customers.