Re: PATCH: true C coroutines -- yield across C stack from anywhere

[Andy Sloane <andy@...>]

Edgar Toernig wrote:

> Are Lua-only coroutines really required? Small survey?
>
> - Who is using them at the moment?
> - Are the Lua-only couroutines good enough for you?
> - Would you switch to C-level coroutines if they were
>  available?
>  
We are using them.  It's extremely important to us that each coroutine 
have a minimal memory impact, because we could potentially have tens of 
thousands of them.

It's actually extremely infrequent that we ever run into a situation 
that Lua coroutines cannot handle.  We just don't have very much C code 
called from Lua which in turn calls other Lua code.  The C functions 
available to our Lua state are almost all "leaf" functions in the 
control flow graph.  So no, it wouldn't be worthwhile to switch for us.

-Andy