> Thanks for the reply. I ended up implementing this idea in Go and wrote a blog post about the results: https://blog.felixge.de/blazingly-fast-shadow-stacks-for-go/

Nice!

> I'm curious if you've done any benchmarking for your implementation as well?

Not in any detail; I just checked that it's significantly faster than doing it naively and left it at that since it was fast enough for my use case.