Bug 78016

Summary:	High process load while rendering pdf
Product:	poppler	Reporter:	Germán Poo-Caamaño <gpoo+bfdo>
Component:	cairo backend	Assignee:	poppler-bugs <poppler-bugs>
Status:	RESOLVED MOVED	QA Contact:
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
See Also:	https://bugzilla.gnome.org/show_bug.cgi?id=728998
Whiteboard:
i915 platform:		i915 features:

Description Germán Poo-Caamaño 2014-04-27 22:25:24 UTC

This was reported in https://bugzilla.gnome.org/show_bug.cgi?id=728998

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When I scroll document, it takes more than a minute to show a page,
during this time one of cpu cores is fully loaded.
Another pdf viewer works well.

Link to a file
https://mega.co.nz/#!1donRahR!r01FPw3DHI7dpW09biJXydlYsbDlF3H_sPE63BqldQw
--------------------------

I can reproduce the problem with poppler-glib-demo and qt4-demo using
Arthur (0.26).

Comment 1 Albert Astals Cid 2014-04-27 22:55:30 UTC

What about splash? (Arthur backend is not production ready really, so you shouldn't be really using it for anything)

Comment 2 Germán Poo-Caamaño 2014-04-27 23:12:09 UTC

Splash renders the document as expected (I forgot to mention it).

I tested with all of them only to check in which product to file the bug.
I will keep in mind for the future to not test against Arthur.

Comment 3 Thomas Freitag 2014-04-28 08:34:23 UTC

Seems to be "cairo backend" problem only: I can open it in okular without seeing that problem, and time measurement shows me:

time ./utils/pdftoppm -png -cropbox -f 1 -l 10 78016.open/lecture4.pdf output/78016

real	0m6.556s
user	0m6.516s
sys	0m0.016s

(which is a reasonable time because of the usage of pattern colorspaces, but:)

time ./utils/pdftocairo -png -cropbox -f 1 -l 10 78016.open/lecture4.pdf output/78016-cairo

real	2m52.166s
user	2m45.826s
sys	0m6.012s

Comment 4 Adrian Johnson 2014-11-01 06:12:02 UTC

With master it takes my PC 157 seconds to render the first 10 pages with pdftocairo. With the patch at bug 33364 it takes 32 seconds.

Comment 5 GitLab Migration User 2018-08-20 21:43:33 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/poppler/poppler/issues/46.

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