Why high CPU for the "PC Magazine" recipe?

dakra · 06-10-2015, 04:50 AM

I thought the "PC Magazine" recipe was hanging, so I killed it, but the same thing happened later, so I added -v -v -v to try to capture the problem. I let it run all night, and it completed, but with astounding CPU usage.

Environment: 4c i7, 8GB RAM, ubuntu 14.04.1, ebook-convert (calibre 1.25.0)

time ebook-convert "PC Magazine.recipe" "PC Magazine.epub" --pretty-print --enable-heuristics --no-default-epub-cover --duplicate-links-in-toc --max-toc-links 998 --toc-threshold 999 -v -v -v 2>&1 |tee -a PCMebook-convert.log &

real 312m26.807s
user 282m31.243s
sys 0m2.230s

The log file is attached as PCMebook-convert.log.txt

Any suggestions? parameters to change?

kovidgoyal · 06-10-2015, 09:47 AM

Dont use heuristics. And add some cleanup to the recipe.

eschwartz · 06-14-2015, 02:00 PM

Also please stop using distro releases of calibre. Most linux distros use some form of FeatureFreeze (and/or patch calibre in unwise ways), which means calibre is usually multiple years out of date. calibre is updated weekly.

calibre v2.x brought Qt5 with a headless Qt plugin that greatly improves memory usage when running the CLI tools.

Currenty calibre is on v2.30.0 which means you are 54 versions behind. (So just one year and a bit, then.

)Thank G-d the news recipes use the most updated versions available on the calibre website.

06-14-2015, 02:00 PM	#3
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Also please stop using distro releases of calibre. Most linux distros use some form of FeatureFreeze (and/or patch calibre in unwise ways), which means calibre is usually multiple years out of date. calibre is updated weekly. calibre v2.x brought Qt5 with a headless Qt plugin that greatly improves memory usage when running the CLI tools. Currenty calibre is on v2.30.0 which means you are 54 versions behind. (So just one year and a bit, then. )Thank G-d the news recipes use the most updated versions available on the calibre website. Last edited by eschwartz; 06-14-2015 at 02:06 PM.

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06-10-2015, 09:47 AM	#2
kovidgoyal creator of calibre Posts: 45,617 Karma: 28549044 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Dont use heuristics. And add some cleanup to the recipe.

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