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On 8/26/05, Michael Sperber <sperber@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > If you aren't using a systems-level language (or don't want to go through > > the effort), then you have to base the lower-levels on an existing upper > > level, which implies all text gets buffered twice. > > Well, sure, if you don't want to go to the effort, almost anything can > be slow. Sorry, but this kind of argument doesn't cut it with me. And if you're not using a systems-level language? Do we completely scorn the Java implementations? > Moreover, if you really want high performance, no ports layer of the > kind described in the SRFI will do the job at all---only the primitive > I/O can. Yes, exactly. But R5RS ports built on native ports can offer high performance. > Can you show me how the C library does it? I can't find it offhand. See the O_DIRECT option to open(2). -- Alex