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Date: Sun, 12 Jun 2016 13:49:16 +0300
From: Andrey Repin <anrdaemon AT yandex DOT ru>
Reply-To: cygwin AT cygwin DOT com
Message-ID: <310054882.20160612134916@yandex.ru>
To: "Riedel,Till (TM)" <till DOT riedel AT kit DOT edu>, cygwin AT cygwin DOT com
Subject: Re: man incredibly slow because it scans for share directory in PATH??
In-Reply-To: <19074b1d-78d1-a425-5a79-434ce8b1d480@kit.edu>
References: <19074b1d-78d1-a425-5a79-434ce8b1d480 AT kit DOT edu>
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Greetings, Riedel,Till (TM)!

> I traced down my problem with really slow man page views this:

> {{{

 >>PATH="/usr/bin:/foo" strace man bar |grep 'foo/share'

> }}}

> I am getting this:

> {{{

>     13   39756 [main] man 6688 normalize_posix_path: src /foo/share/man
>     16   39772 [main] man 6688 normalize_posix_path: /foo/share/man = 
> normalize_posix_path (/foo/share/man)
>     13   39785 [main] man 6688 mount_info::conv_to_win32_path: 
> conv_to_win32_path (/foo/share/man)
>     12   39810 [main] man 6688 mount_info::conv_to_win32_path: src_path 
> /foo/share/man, dst C:\tools\cygwin\foo\share\man, flags 0x3000A, rc 0
>     16   39912 [main] man 6688 mount_info::conv_to_win32_path: 
> conv_to_win32_path (/foo/share)
>     14   39942 [main] man 6688 mount_info::conv_to_win32_path: src_path 
> /foo/share, dst C:\tools\cygwin\foo\share, flags 0x3000A, rc 0

> }}}

> If my PATH is the real one this goes on forever, and generates some 
> problems,like:

You have lots of duplicated, obsolete and overlapping paths in your %PATH%.
I suggest you start from some homecleaning.
Not to mention strange ones, like "/".

> {{{

 >>time man bar
> No manual entry for bar

> real    0m23.650s
> user    0m0.000s
> sys     0m0.108s

> hanging e.g. on

>     20 2449004 [main] man 8124 mount_info::conv_to_win32_path: src_path 
> //share/man, dst \\share\man, flags 0x4022, rc 0

> }}}

> VS.

> {{{

 >>PATH=/usr/bin/ bash -c "time man bar"
> No manual entry for bar

> real    0m0.082s
> user    0m0.031s
> sys     0m0.045s

> }}}

> Any ideas why man does look for "share" in the whole path? Tbh I haven't 
> looked at the man source code. Thx in advance!


-- 
With best regards,
Andrey Repin
Sunday, June 12, 2016 13:47:12

Sorry for my terrible english...


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