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Re: pipe performance problem

Christopher Faylor <cgf-cygwin@cygwin.com> wrote:

> On Thu, Nov 28, 2002 at 01:20:46AM +0100, thomas wrote:
>>Christopher Faylor <cgf-noreply@cygwin.com> wrote:
>>
>>> If there is no data in a pipe it can wait for 10ms waiting for it, yes.
>>> See ready_for_read/peek_pipe in select.cc.
>>
>>Yep i saw the Sleep (10) and though the same thing, but i figured that
>>can't be it when i commented it out, compiled a new cygwin1.dll and the
>>10ms delay was still there.

> It's not a Sleep 10.  It's a WaitForSingleObject in ready_for_read.

Yep you are right. It waits, here:

if (WaitForSingleObject (signal_arrived, avail ? 0 : 10) == WAIT_OBJECT_0)

now is to find out why. i will post again :)

thomas


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