You came to PerlMonks three weeks ago, and started asking questions like:

• How to query mysql database schema with DBI
• Trouble with Benchmark
• Does DBI handle table alias?

Then, one week later, all of a sudden you have become a database and benchmarking expert and started blowing your trumpet (Basic Perl array intersection faster than mysql query join.) until today you releasedthe full wisdom of you findings.

I don't buy it. To me it appears that the thing you have understood better so far (Perl) is better than the thing you haven't fully understood (the database).

If you want to propose a public comparison, you have to publish the test data you were using. If the data is classified and can't be released, then generate some dummy data and release either the generation script or the data itself (perhaps by means of an external link). If you do that, then perople here could do better than guessing what could be behind your reasoning.

As for me, I don't believe your benchmarking for a simple reason: databases are definitely better than Perl at crunching tabular data, provided that you use them correctly.

This is actually a challenge. Show us the data, and then we'll see which method is really the best one.