Congrats guys!
Would share some technical details, I bet you have great stories to tell.
Let’s, what is forking? You completely copy disk, make ram snapshot and run it? If CoW, but ram? You mentioned 8GB ram vms. Sounds like impossible to copy 8Gb under 500ms, also disk?
We're actually median under 500ms — ~320ms median — I just didn't want to piss of hacker news with over estimatation.
We have another set of optimizations that we believe can take us to ~200ms in the next few months but beyond that we're pretty much completely stuck.
Realistically other sandboxes will be able to get there before us because we've chosen to support so much of Linux/if you don't run an operating system or don't support custom snapshots that is much easier.
Insane. Does it possible to fork to another bare metal machine? Maybe multi region as fly io.
If not, I bet you have huge disk sizes on your machines to store all the snapshots (you said, you store them and bill only for disk space).
So forking across multiple nodes in that speed is not possible — we run extremely beefy nodes in order to avoid moving VMs across nodes as much as possible.
We are researching systems of hot moving VMs across VMs but it would have very different performance characteristics.
Our tech is not decades old so there is a chance we've missed something but our layer management is atomic so I'd be shocked if you'd be able to corrupt state across forks/snapshots.
