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innodb key comparisons

To: maria-developers@xxxxxxxxxxxxxxxxxxx
From: Rich Prohaska <prohaska@xxxxxxxxxxx>
Date: Thu, 25 Jul 2013 15:12:20 -0400

i am interested in the performance of in memory join queries on tokudb and
innodb and, for innodb, i would like to know how many key comparisons were
needed when running the query.  i counted the number of calls to a function
called "cmp_dtuple_rec_with_match".  does this include ALL of the key
comparisons?
thanks
rich prohaska