gc and strings

[Paul Bleisch <pbleisch@...>]

Two questions:

a) Is there a place in the lua C code that I can stick
   a breakpoint to watch/trace the garbage collection?

b) Does the Lua compiler (i.e. dofile() or luac) combine
   duplicate strings?  I have a lua file that is rather 
   large but duplicates some strings 20-30 times.

Paul