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Old 07-17-2014, 09:16 AM   #11
JSWolf
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Posts: 79,997
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Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by Tex2002ans View Post
  • Overly large/badly compressed covers/images.
  • A "phantom cover"
    • I have come across a few purchased books where there is a useless second cover inside of the book, which isn't referenced or anything, just takes up space.
  • When the EPUB was packaged, they didn't compress it, or didn't compress to the maximum level (this one just baffles me).
    • I have come across a few purchased books which had zero compression on them.
  • Bad code/formatting could bloat the EPUB (oh the horrors I have seen).
  • Fonts that are not subsetted
  • Fonts that aren't used/referenced
    • For example, including a bold font when no bold is used, or a smallcaps font when no smallcaps are used.
Modify ePub can get rid of unused images and subsetting gets rid of unused fonts and reduce the used fonts in size.

Thumbnails are a common waste of space and Modify ePub deletes those no problem.
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