This incorrect. They've made optimizations in this space, but it's a hard problem with a lot of variables. Examples include mostly solving for VPC + elastic int

This incorrect. They've made optimizations in this space, but it's a hard problem with a lot of variables. Examples include mostly solving for VPC + elastic interface provisioning, which used to take much longer and made Lambdas within VPCs unusable for customer facing APIs. The size of the individual Lambda matters quite a bit. It has to be downloaded, processed, and initialized. Latency then varies by language. They can optimize things like their own Lambda runtime that executes that code on a per language basis being quicker, but the rest are hard problems and/or requires educating customers. Their biggest problem is they oversold Lambda and serverless in my opinion, and now walk it back very slowly, buried deep in their documentation.