Unison 2.10.2 fast update check broken?

[Rolf Campbell]

Marcus Picasso wrote:
> Seems that Cygwin port of the unison file synchronizer does not do the
> -fastcheck very well. Transcript follows:
> 
...
> 
> Can somebody confirm / explain this behaviour? I have a large tree that I'm
> synchronizing across two hard-disks, and got suspicious when re-running
> synchronization takes longer than expected. The above transcript 
> functions as
> expected using linux or native Win32 unison builds.
> 
> Regards,
> -Marcus.


I have noticed a change in how -fastcheck which seems to be caused by my 
upgrade from cygwin 1.5.14 -> 1.5.16.  I tried doing a unison sync 
between a maching running 1.5.14 and a machine running 1.5.16 when I 
noticed the 1.5.16 machine spent a lot of time grinding the disk.  So, I 
upgraded the 1.5.14 machine to 1.5.16 and it too went from a 10 second 
scan time to a half hour of heavy disk access.
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