For serverless technologies to "win" they have to solve the "cold start" problem. AWS likes to pitch Lambdas as an easy mobile backed, but if you need to talk to a DB (which most mobile backends do) then you'll want to put your Lambda in a VPC, which makes cold starts on the order of 5-10 seconds, which is a deal breaker for most synchronous APIs.
I don't understand why AWS or GCP haven't added "pre-warming" requests to their cloud functions, similar to App Engine.
I don't understand why AWS or GCP haven't added "pre-warming" requests to their cloud functions, similar to App Engine.