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Date:	Tue, 16 Dec 2008 20:12:37 -0700
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According to Christian Franke on 12/16/2008 1:18 PM:
> 
> On my XP SP2, st_size is always 0, even for large and fragmented
> directories.

Likewise for all the machines I have access to.  Maybe it is just Vista
that added directory size tracking?

>>
>> Interesting question.  NTFS and FAT filesystems are name-sorted by
>> default.  AFAIK directory changes on FAT are done in-memory, resorted,
>> and then written back as a whole block to disk.  
> 
> XP does not sort a FAT directory.

Most readdir() implementations return files either in creation order or
name order.  But what matters for the optimization done by coreutils is
inode order - on file systems where increasing inodes represent increasing
disk positions, then stat'ing files in inode order results in less seek
time than visiting files in name order.  I guess what needs to happen now
is actually testing whether NTFS is like ext3 in benefiting from the inode
sort.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9 AT byu DOT net
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