On Mon, 2003-08-04 at 11:53, Tom Lane wrote:I find it really, really hard to believe that a crude reimplementation in plpgsql of the TOAST concept could beat the built-in implementation at all, let alone beat it by two orders of magnitude.
Either there's something unrealistic about your testing of the dna_string function, or your original tests are not causing TOAST to be invoked in the expected way, or there's a bug we need to fix. I'd really like to see some profiling of the poor-performing external-storage case, so we can figure out what's going on.
I was really hoping for a "Good job and glad to hear it" from you :-)
I don't think there is anything unrealistic about my function or its testing, as it is very much along the lines of the types of things we do now. I will really try to do some profiling this week to help figure out what is going on.
Is there a sample table schema and dataset available (external-storage case) that we can play with?
Joe
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