Peter Eisentraut <peter_e@xxxxxxx> writes: >> Does anyone have any ideas/opinions/statistics on what the performance >> difference is between the two calling conventions? > Version 1 is technically slower if you count the number of instructions, That would be true if you compare version-0-to-version-0 calls (ie, plain old C function call) to version-1-to-version-1 calling. But what is actually happening, since everything in the backend assumes version 1, is that you have version-1-to-version-0 via an interface layer. Which is the worst of all possible worlds --- you have all the overhead of a version-1 call plus the interface layer. regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
