I'm curious about the remaining 20s to start the code on the container. What's the bottleneck there? It seems like you'd need to identify the container, tell it which S3 object has the new source.pex, the container would download it, and then when you run `PEX_PATH=deps.pex ./source.pex` you're up. All that feels like it should take less than 20s. If picking the container takes long, you could probably start that process as sources.pex is built.