pipe performance problem

[Robert Collins]

On Fri, 2002-11-29 at 13:00, Christopher Faylor wrote:

> Of course, it is entirely possible that there is something wrong with
> the logic in cygwin and that a pipe is waiting 10ms for every read or
> something like that.  I don't know.  I don't see how that's possible
> from the code in ready_for_read but it's certainly at least a
> possibility.

My WAG is that this is happening:

because dd has higher scheduler priority, it interrupts mkisofs every
10ms, and on average hits the 10ms sleep every second read.

Rob
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