On Thu, 2011-02-03 at 11:42 +0000, Ross Burton wrote: > > - Not storing meta data inside the thumbnail image itself. This is > > harder for JPEGs and slow in any case. This is most important > for > > time stamps, which is done by setting the mtime of the file > instead > > of putting a Thumb::MTime tag into the image. > > I agree that the timestamp can be moved to the mtime of the thumbmail > for performance reasons. As we don't expect there to be any other > metadata in the JPEG, storing the original URI as the EXIF > ImageDescription field shouldn't be a problem.
After reading other mails, I see you meant slow as in slow to verify. How likely is a hash collision? An even better optimisation would be to drop the URI check if they are sufficiently unlikely and performance heavy... Ross -- Intel Open Source Technology Centre http://oss.intel.com/
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