File operations speed-up

[Rick Rankin]

What are you going to do about backup utilities that clear this bit when a
file has been backed up? I assume that there are still backup utilities out
there that use the archive bit for determining when a file needs to be
backed up.


At 02:15 PM 3/17/97 +0300, Sergey Okhapkin wrote:
>Hi!
>
>This patch increases the speed of stat/lstat calls dramatically. The trick 
>is simple. Cygwin's stat call implementation reads the beginning of stated 
>file to look for a "magic cookie" to define "executable" and "symlink" 
>attributes of a file. With this patch reading is performed only if file 
>have "archive" bit cleared. All ordinary files (not executables/symlinks) 
>have this bit set. After applying this patch You have to "chmod +x file" on 
>all executables/symlinks. I made a "chmod +x *" on directories with 
>binaries. Later I'll write a special utility "fssync" to examine all files 
>in a given directory tree and to set archive bit according to file magic 
>cookie. Compare the time of "du ." on cygwin's root without and with this 
>patch :-)
>
> 
>
>--
>Sergey Okhapkin
>Moscow, Russia
>Looking for a job.
>
>
>
>Attachment Converted: "e:\eudora\rick\attach\archive.diff"
>
>-
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>
Rick Rankin
rrankin@primenet.com
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