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1. Re: My pdfs are sluggish to view, please help
kashifMohd Feb 18, 2011 1:27 AM (in response to jt77474)Which Acrobat version you're on?
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2. Re: My pdfs are sluggish to view, please help
jt77474 Feb 18, 2011 3:39 AM (in response to kashifMohd)9.0.0 Pro Extended
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3. Re: My pdfs are sluggish to view, please help
jt77474 Feb 18, 2011 8:40 AM (in response to jt77474)I think I have found the problem. It is the monochrome compression method used by acrobat.
If you resave the file, choose optimised pdf, Settings -> monochrome Images you can choose the compression method.
JBIG2 appears to be the default. Small files, but very poor performance. CCITT 4 is good, and zip is very quick but slightly larger files.
I'm surprised that when you open a pdf there doesn't appear to be a way to tell which compression method is used. Should it not be in the metadata?
Either way,I think it's a bug that acrobat defaults to JBIG2 - this is very slow, even on my Core I7 cpu overclocked to 3.6ghz. I should not have to experience delays with this machine, but JBIG2 is responsible for those delays. Please look into this.
And if someone can tell me how to assess which compression method is used in any given pdf, please let me know. Thanks
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4. Re: My pdfs are sluggish to view, please help
jt77474 Feb 20, 2011 4:11 AM (in response to jt77474)Hmm. This must be the world's least helpful forum.
Does noone know how to tell from a pdf which image compression method has been used? Should this not be in the metadata? This is simple stuff.
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5. Re: My pdfs are sluggish to view, please help
Bernd Alheit Feb 20, 2011 8:24 AM (in response to jt77474)Use the Preflight Tool in Adobe Acrobat.



