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Subject: rm -Rfv on UNC path horribly slow in Cygwin
3.6.0-0.404.g323729f654ae.x86_64 ...
To: cygwin AT cygwin DOT com
Cc: ms-nfs41-client-devel AT lists DOT sourceforge DOT net
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From: Roland Mainz via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Roland Mainz <roland DOT mainz AT nrubsig DOT org>
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi!

-----

Something is wrong with UNC paths in Cygwin 3.6 build
3.6.0-0.404.g323729f654ae.x86_64 and ms-nfs41-client 2025-02-21:

Example:
---- snip ----
$ cd //derfwnb4966_ipv4 DOT global DOT loc AT 2049/nfs4/bigdisk/builds/bash_build1
$ rm -Rfv bash
removed 'bash/builtins/hash.o'
removed 'bash/builtins/fc.o'
removed 'bash/builtins/jobs.o'
removed 'bash/builtins/help.o'
removed 'bash/builtins/history.o'
removed 'bash/builtins/let.o'
removed 'bash/builtins/kill.o'
removed 'bash/builtins/mapfile.o'
removed 'bash/builtins/pushd.o'
removed 'bash/builtins/read.o'
removed 'bash/builtins/return.o'
removed 'bash/builtins/setattr.o'
---- snip ----

Each line from rm -Rfv now needs around 3-5 seconds. Switching to CWD
//derfwnb4966_ipv4 AT 2049/nfs4/bigdisk/builds/bash_build1 (e.g. non-FQDN
for share host) does not fix the problem. Going to
/cygdrive/l/builds/bash_build1 and the rm -Rfv deletes around 70-90
files per second.
Last tested version was Cygwin commit
#4bcc6adec765ee8354bfc9e6c060c9d1c0c7bf46 (and same ms-nfs41-client
2025-02-21 release), rm -Rfv performance there was normal (same as on
/cygdrive/l/...).

----

Bye,
Roland
-- 
  __ .  . __
 (o.\ \/ /.o) roland DOT mainz AT nrubsig DOT org
  \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
  /O /==\ O\  TEL +49 641 3992797
 (;O/ \/ \O;)

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