
hogarth |

Why does Paizo provide various single PDFs as .zip archives? My understanding is that the algorithm for creating a PDF already uses Zip compression when necessary, so there should be little or no benefit from further zipping a .pdf file. At least that's what I gathered from this web page (among others). Am I misreading something?
(The reason I'm asking is because my work firewall blocks .zip files, of course.)

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Why does Paizo provide various single PDFs as .zip archives? My understanding is that the algorithm for creating a PDF already uses Zip compression when necessary, so there should be little or no benefit from further zipping a .pdf file. At least that's what I gathered from this web page (among others). Am I misreading something?
(The reason I'm asking is because my work firewall blocks .zip files, of course.)
I've found that when it's a straight pdf, the browser opens it as the default rather than downloading it. It doesn't produce any significant extra compression I can see.

Disenchanter |

Well, .zip-ping a PDF does reduce the size... Approximately 5% average from the sampling I did of my Paizo PDF collection.
As someone who is about to move to an area where dial up is the most financially efficient internet connection, I can see that as still being welcome. (It can cost $1000+ to get cable run to your house, before monthly costs.)

Jam412 |

Ah, that makes sense. Doesn't help me, but it makes sense. :-)
Could you unzip them on your home computer, throw them on a flash drive and bring them to work?

hogarth |

hogarth wrote:Ah, that makes sense. Doesn't help me, but it makes sense. :-)Could you unzip them on your home computer, throw them on a flash drive and bring them to work?
Oh sure (or e-mail them to myself, or whatever); it's not really a problem (especially considering that work hours are for, you know, working).

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Disenchanter wrote:Well, .zip-ping a PDF does reduce the size... Approximately 5% average from the sampling I did of my Paizo PDF collection.My understanding was that that's a sign of an inefficient .pdf creator, but again I could be mistaken.
Not necessarily... while the images in a PDF can be compressed, the images are only part of the story. If you use zip compression on a PDF—even one that has compressed images—you'll usually still save a little bit of space because you're compressing other portions of the document.

Disenchanter |

Jam412 wrote:Could you unzip them on your home computer, throw them on a flash drive and bring them to work?Yes (I carry around my PDFs on a 16GB flash drive for convenience). But check with your workplace with regard to reviewing said content on their machines.
If your workplace has a half way decent IT/Security department, they should be against you bringing flash drives to work.
USB Switchblade
USB Hacksaw
(Note: The Switchblade idea is about 5 years old, and many people aren't even aware of it yet...)