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HarryT · 11-05-2009, 03:19 AM

I seem to be approaching some sort of "limit" in doing Mobi to ePub conversions in Calibre. A "normal" size novel converts in a few seconds, but large books seem to take exponentially longer and longer. I've recently created a number of large "omnibus" editions of books:

A Mobi book with 8MB of HTML source took 9 minutes to convert.
A Mobi book with 10MB of HTML source took 20 minutes to convert.

This is on a fast, modern, PC with a dual-core CPU and 4GB RAM.

Given that both the books have well-formed HTML, and short chapters, is there any reason for this seemingly exponential rise in conversion time? I would have expected that a 10MB book would take 10x as long to convert as a 1MB book, but it's way, way, longer than that.

Is there any absolute upper limit to the largest book that Calibre can convert?

11-05-2009, 03:19 AM	#1
HarryT eBook Enthusiast Posts: 85,557 Karma: 93980341 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	ePub conversion capacity limits? I seem to be approaching some sort of "limit" in doing Mobi to ePub conversions in Calibre. A "normal" size novel converts in a few seconds, but large books seem to take exponentially longer and longer. I've recently created a number of large "omnibus" editions of books: A Mobi book with 8MB of HTML source took 9 minutes to convert. A Mobi book with 10MB of HTML source took 20 minutes to convert. This is on a fast, modern, PC with a dual-core CPU and 4GB RAM. Given that both the books have well-formed HTML, and short chapters, is there any reason for this seemingly exponential rise in conversion time? I would have expected that a 10MB book would take 10x as long to convert as a 1MB book, but it's way, way, longer than that. Is there any absolute upper limit to the largest book that Calibre can convert?