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How does a cold start perform, I'm guessing with sandboxing of v8 vs a whole new container, and deserialization of a single script into a free sandbox v8 slot (perhaps they store the AST or preJITed code for even faster start? - not familar with v8 internals) it is much faster than cold starting nodejs on AWS lambda?

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This is one of those questions I love answering. :)

It turns out V8 is very well-optimized for loading JavaScript quickly, since that's exactly what it needs to do when loading a web site with a user waiting.

We're seeing average cold start times under 5ms.

There are some features in V8 to make loading a script even faster.

I'd be glad to connect over these features on twitter (same username). I implemented them.

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