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Old 01-26-2012, 01:57 AM   #16
pnhearer
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It's possible, but I don't think I saw the thing push over 47%~
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Old 01-26-2012, 10:16 AM   #17
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Calibre: a single job will only use a single core.

Sometime, Calibre will have multiple jobs (count in the task wheel) that will use multiple cores (if settings allow), but the 1 job within a core rule still applies.

BTW Over enthusiastic A/V scaning will eat time
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Old 01-26-2012, 04:19 PM   #18
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No AV installed. All my interweb traveling and file downloads go into my virtual machine. Just strict routing rules,Ubuntu server (packet/protocol filter firewalls). Unless its from Amazon or something I trust...
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Old 01-27-2012, 12:16 AM   #19
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Quote:
Originally Posted by pnhearer View Post
It's possible, but I don't think I saw the thing push over 47%~
How many threads do you allow Calibre to use? The Calibre default settings has it set to 3 with my CPU (i7-860). The longest conversion I've done (relatively simple and well-formed 40-chapter, 5MB XHTML file) took less than 5 minutes so it's hard to imagine 226 ebooks taking more than 24 hours for conversion unless it's a CPU limitation or the books are really, really big. Also, as far as I see, Calibre processes stuff in memory as much as possible.
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Old 01-27-2012, 04:15 AM   #20
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Have you looked at the job queue to see if all books are slow to convert? Might be just one or two holding things up.
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Old 01-27-2012, 05:53 AM   #21
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Have you looked at the job queue to see if all books are slow to convert? Might be just one or two holding things up.
Helen
+1

I've done 300+ conversions in about 1 hour on a dual core CPU. you have one or more problem books or some unusual preferences set. e.g. having heuristics set to ON is an example of a setting that greatly slows some conversion. Conversion is a CPU bound process.

having said that - I was converting epub to mobi. I am aware that pdf to epub can be much slower, but wiser folks would avoid using PDF altogether & look for alternative source formats
Last edited by cybmole; 01-27-2012 at 05:58 AM.
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Old 01-27-2012, 09:24 PM   #22
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Well call me dumb, most of mine are pdf converts to epub....I have an Intel Core 2 Quad Q6700.
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Old 01-27-2012, 10:40 PM   #23
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Not dumb. You are doing one of the nastiest formats to convert from.
With that quad-core, let it grind away on a few at a time. You should shill have a few cycles left for a game of solitaire or 2
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