in reply to Re: Basic Perl array intersection faster than mysql query join.
in thread Basic Perl array intersection faster than mysql query join.

Here's another thought - if your database will only ever be used to find intersections, why not pre-calculate all of them in some manner? Just because your database is normalized doesn't mean it's the right schema for your purpose.

For example, I have selectively denormalized my reporting database, just to reduce the number of table joins. Since I control all writing to the database and the database is specialized to a given purpose, this is a good breaking of the rules.

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