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> > >1. Is there profiling tool to check Lua memory footprint? 

Lua 4.0 has a new function `gcinfo'. Its first return is the current
memory usage of Lua. This value is a lower bound, usually within 5% of
the real value, and is expressed in Kbytes.

  > lua -e "print(gcinfo())"
  22	27

(the second result it the current threshold for GC).

(Unfortunately, this function did not find its way into the manual ;-)

-- Roberto