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Date: Mon, 2 Mar 2026 23:42:00 +0100
Message-ID: <CAKAoaQkR+W_tRCkZkrXws6V0DhuLqKo6U4idGEpMOS7v_N5biQ@mail.gmail.com>
Subject: Ideas how to improve Cygwin /usr/bin/find, rm -Rf etc. performance...
To: cygwin AT cygwin DOT com
From: Roland Mainz via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Roland Mainz <roland DOT mainz AT nrubsig DOT org>
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Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi!

----

Quick note (mainly for Corinna):
Cygwin 3.7.0, I noticed a possible performance improvement while
working on ms-nfs41-client:
For each file/dir listed by /usr/bin/find, rm -Rf .. etc I see two
QueryVolumeInformation (volumequery class=1 and class=4) which
technically could be cached per mount+process.

I also recall an old confcall at SUN around |openat(dirfd, ...)|,
technically this info could also be cached per-dirfd (and inherited if
the dirfd is used to |openat()| another dir fd), making such a cache
last longer...

----

Bye,
Roland
-- 
  __ .  . __
 (o.\ \/ /.o) roland DOT mainz AT nrubsig DOT org
  \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
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 (;O/ \/ \O;)

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