It takes me a very long time to save my 88 slide deck (much longer than to load it) - you can load it as hybrid PDF here: http://people.gnome.org/~michael/data/2014-04-26-story-of-libreoffice.pdf Profiling it in callgrind overnight (yes it takes that long ;-) it turns out that ~all of that time is consumed -loading- and de-compressing the images - there is ~zero cost for exporting them (so I can only think that the binary data is copied directly across to the new container - which is good). That is really silly =) and (perhaps) another example of the really unfortunate image handling design we have [ though it could just be a silly bug I guess ].
Created attachment 98165 [details] export- showing a ton of reading of images (but no writing)
Interestingly the slowest conversion in our callgrind tests at: http://dev-builds.libreoffice.org/callgrind_report/ is 051_fdo#73300.odt-convert - whose profile shows a huge amount of time spend loading, un-compressing and checksumming images - but virtually no time converting/exporting them. Which is perhaps another interesting data point.
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