Explain 50ms / 2s timeout better (common support question)

[rbetts]

Here's a common question that we don't have docs for...

I cannot for the life of me find out what happens if I exceed the 50ms execution limit for a function. Some of my operations are around generating commits to a virtual git repository, and so whilst there is a lot of IO, which I know doesn't count towards the limit, there is also a lot of hashing of files and signing using PGP which is inefficient but necessary. How can I purchase longer function call times ? I think I could live with a 1,000ms ceiling, and I'm happy to pay a higher price for more runtime, but if the function is forcibly ended I can't see how to fix that easily on my end.