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Date: Mon, 21 Jul 2025 17:19:00 +0200
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Subject: Re: SLOW ls(1) - cygwin dir lookups with WinNT async requests?
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From: =?utf-8?q?Aur=C3=A9lien_Couderc_via_Cygwin?= <cygwin AT cygwin DOT com>
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On Fri, Jul 18, 2025 at 12:50 PM Andrey Repin <anrdaemon AT yandex DOT ru> wrote:
>
> Greetings, Aurélien Couderc!
>
> >> >> Stat and ACL info require additional calls.
> >>
> >> > Right, but my proposal is to do parallel/async lookups. The Windows NT
> >> > kernel depends heavily on multithreading and parallelism, of which
> >> > Cygwin uses nothing right now for dir lookups.
> >>
> >> Not an option unless it can be cheaply done under winsup/cygwin/fhandler.
> >> Most utilities are GNU/BSD/Linux ports, so custom mods would have to be
> >> submitted and accepted upstream, as we often already have enough patches to
> >> maintain, to get them to build and work cleanly under Cygwin.
>
> > I think you misunderstand me. I am suggesting to improve the Cygwin
> > implementation of opendir(), readdir() and friends to do Win32/WInNT
> > calls async to speed up dir listings.
>
> If you know how it can be done, why not provide a patch?

Because I am not YET qualified? This is god level Cygwin hacking
level, like Corinna Vinschen can do. I'm just a student, doing some
ReactOS/Windows hacking.

Aurélien
-- 
Aurélien Couderc <aurelien DOT couderc2002 AT gmail DOT com>
Big Data/Data mining expert, chess enthusiast

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