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> Does the introduction of integers slow the interpreter so much (it
> is the only architectural change I know of that could possibly
> affect so much the tests)? Since I got some compilation warnings
> (see another subthread) I tried to recompile with different TDM-GCC
> versions, but to no avail: lua 5.3 is a crawl compared to the
> previous versions.

The use of 64-bit integers in 32-bit architectures may slow down the
interpreter a little bit, for some programs, but nothing close to what
you are relating.  A difference from a couple of seconds to 3 minutes
is completely unexpected. (In my machine, the worst cases are in the
order of 10~20%, with several programs being not affected or running
even faster.)

-- Roberto