https://bugzilla.wikimedia.org/show_bug.cgi?id=24821

           Summary: ImageMagick identify uses a lot of memory
           Product: MediaWiki extensions
           Version: any
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: PagedTiffHandler
        AssignedTo: gla...@hallowelt.biz
        ReportedBy: tstarl...@wikimedia.org
                CC: brightb...@gmail.com


PagedTiffHandler uses ImageMagick identify to get some information about the
file, such as the widths and heights of each of the pages. It appears to be
extremely memory-inefficient, probably decompressing the whole image. This will
cause images to fail to be rescaled, or to fail to upload, once
PagedTiffHandler is deployed. 

Please consider tiffinfo from libtiff as an alternative.

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