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Some quick thoughts:

  • #1: Use Devel::NYTProf or another profiler to see what the actual hot-spots in your code are!

  • Read lines from disk one at a time rather than slurping into @lines

  • Consider defining rules as subroutines acting on an argument and then use Memoize to cache results (assuming attributes re-occur frequently)

  • If you're re-running this against the same set of lines and rules frequently, cache the rule test results in a file or DB so you have DEFECTID and a list of rules it matches.

  • Perhaps reorganize the rules (if you can): $hash->{RULETYPE}->{RULENUMBER} = value. Then iterate the list of rules for each attribute, rather than (as you have it), iterating the attributes for each rule. I think that saves a lot of if ( defined $rulelist->{$rulenum}->{REGION} ) comparisons.


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In reply to Re: Algorithm To Select Lines Based On Attributes by xdg
in thread Algorithm To Select Lines Based On Attributes by ~~David~~

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