Wouldn't that be expensive to use with FFI, or call the OS functions? What about interrupt handling? Didn't Go went through a similar phase with spaghetti stack

Wouldn't that be expensive to use with FFI, or call the OS functions? What about interrupt handling? Didn't Go went through a similar phase with spaghetti stack, only to revert back to standard one. Then it'll be tricky to do yet another "stack" walker to obtain performance metrics (eBPF, or say on Windows through standard ETW mechanisms)