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From: Valentin Nechayev <netch@ivb.nn.kiev.ua>
Subject: Re: gnu/62782: strlcpy performance problem
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The following reply was made to PR gnu/62782; it has been noted by GNATS.

From: Valentin Nechayev <netch@ivb.nn.kiev.ua>
To: chc <chc@mail2000.com.tw>
Cc: freebsd-gnats-submit@freebsd.org
Subject: Re: gnu/62782: strlcpy performance problem
Date: Sat, 27 Mar 2004 21:26:10 +0200

  Fri, Feb 13, 2004 at 02:30:21, chc (chc) wrote about "gnu/62782: strlcpy performance problem": 
 
 c>      while (*s++);            /* performance problem when src is mmap pointer */
 c> Mmap a big file which is above 500M and use strlcpy. I found it was very slow.        
 
 As mapping is on per-page basis, any implementation of per-char scanning
 (as required by C-styled string copy) will be much faster than page fault
 interrupt. So your problem isn't strlcpy slowness, but bad program design:
 you should not use nul-terminated strings for this task.
 
 PR is already closed, but I want add my $0.05 to clarify that it isn't
 one function problem, but conceptual problem (and strncpy() can't fix it,
 but can only aggravate). Redesign your program.
 
 
 -netch-