[SomeCallMeTim]

Ahh, but here's the deal: The way the Nginx Lua module is written, you store everything in local variables. Those stay consistent across yields, and are tied to a single invocation of the Lua function.

So except for things you should EXPECT to change (like the state of a database you're querying) between calls, the "world" you (as a programmer) should care about stays perfectly consistent.

Unless I'm not understanding what you're asking -- is there some situation that I haven't encountered where the state of something that isn't a local variable matters?