WOW. All I can say is duhhhh. This is way over my little CF head. :) On 12/26/06, Jochem van Dieten <[EMAIL PROTECTED]> wrote: > Katz, Dov B \(IT\) wrote: > > You shouldn't need to take memory into consideration if you use a > > java.io.BufferedOutputStream and java.io.PrintWriter etc... > > Yes you should. Let's say we are writing 1.3 million, 20 character records > from the database to a .csv. First CF queries the database and buffers the > resultset (26 MB). In the proces it needs to convert from the database > charset to its internal charset (26 MB, maybe 52 MB). Then you loop over the > resultset and generate the .csv which you hold in memory (26 MB). In the > process of your 6 million loops you generate 8 bytes of whitespace for each > iteration (10.4 MB). Then you write it out. > > Of the total memory consumption of 94.4 MB (120.4 MB if you are unlucky with > the charsets), using Java to write it out saves you 26 MB. And that is when > we ignore the overhead of the different datatypes, with the overhead the > numbers would probably be worse. > > Jochem > >
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