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Old 01-16-2011, 12:15 AM   #13
DoctorOhh
US Navy, Retired
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Quote:
Originally Posted by gweminence View Post
Tell you what. Give me your longest, worst conversion file. If it takes my computer as long as you say, I'll publicly eat crow. If not...not.
I only keep the final epub output in my library. The other formats are sent to the bit bucket. But I'm sure someone must have an example lying around.

I recall that the original epub to epub conversion of Eldest by Christopher Paolini was one that took hours, but now that it has been cleaned up a epub to epub conversion takes only 2 minutes.

Quote:
Originally Posted by gweminence View Post
Because here's a simple fact: conversions are a function of processing power, at their most basic level, it's a matter of how many cpu cycles it takes to make said conversion.
If this was so simple the epub to epub conversion that took hours the first time wouldn't take just 2 minutes the second time.

Quote:
Originally Posted by gweminence View Post
It isn't a matter of what kind of file it is. It's a matter of what kind of muscle you bring to bear on it, and the algorithms used by calibre.
This is mostly true. It isn't a matter of what kind of file it is but a matter of what kind of crap is in the file. I have seen epubs that had started as Word docs. These epubs had 100+ separate html files within and each html file had 20-30 thousand lines of style crap that calibre had to sort through, flatten out and reassemble.

I may be wrong but unless some recent optimization has been done in this area each conversion is handled by one process and utilizes essentially one core at a time.

You are right file type is not a determinate factor but experience shows what is in the file is critical to how long it takes.
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