>
> With respect to time complexity, the question is that the parse time is
> 2.4 or cubic with respect to exactly what?


The tradition is to measure time with respect to n, which n is the length
of the input in characters of some alphabet, and the time only includes
parsing time, not evaluation time.  This is how Earley's algorithm can be
cubic, when the number of parses can be super-exponential, and so simply
listing every parse would be far worse than cubic.  The idea here is that
you don't know how complex or simple an evaluation the applications wants,
so it would confuse things to include evaluation time.  It's possible, for
example, that parsing is simply recognition -- all you want is a "yes" or
"no" as to whether the input matches the grammar.

Again, best of luck, jeffrey

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