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On Mon, Oct 25, 2010 at 2:22 PM, Eric Hellman <[log in to unmask]> wrote: > I think you'd have a very hard time demonstrating any speed advantage to MARC over MARCXML. Not to bring up this old topic again, but I'm just finishing up a conversion from "parse this text structure" to "blit this binary data structure into memory." Both written in python. The text parsing is indeed fast -- tens of milliseconds to parse 100k or so of data on my laptop. The binary code, though, is literally 1,000 times faster -- tens of *microseconds* to read the same data. (And in this application, yeah, it'll matter.) Blitting is much, much, much faster than lexing and parsing, or even running a regexp over the data. Cheers, -Nate