Re: [bug-recutils] Selection is extremely slow when fields with common name exist

[Jose E. Marchesi]

Hi John.

    Running the script below, the recsel command takes forever (and eventually 
    crashed).  It seems to be related to having multiple fields with the
    same name, 

I just committed a patch with an optimization in the SEX expression
evaluator: now it does not eval the expression in permutations of field
names which are _not_ part of the expression.  This makes the evaluation
of your example sex 

   ./utils/recsel -e 'Name = "That"' foo.rec

immediate, but only because 'junk' does not appear in the selection
expression.   If the expression was

   ./utils/recsel -e 'junk = "That"' foo.rec

then we would be back to the slowness.

Well, this is better than nothing :) More idas for optimizing the
evaluator highly welcomed!