1311622 - [e10s] Extremely slow to open (large (> 30MB) PDF files). And other opened tab is unresponsive

Status: RESOLVED WORKSFORME

(Firefox :: PDF Viewer, defect)

Description

[David Bourguignon]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0
Build ID: 20160922113459

Steps to reproduce:

I tried to open the following PDF documents:

http://fondation.cetim.fr/pages/projets/fondationCetim_RecuperationEnergieVibrationsAmbiantes.pdf

http://www.apur.org/sites/default/files/documents/incidences_evolution_loi_ALUR_bati_parisien.pdf


Actual results:

Firefox got stuck for several minutes, and this caused every opened tab to freeze too... Since the whole browser was now useless, my patience ran out and I killed the Firefox process.

Ironically, the very same link, on the very same machine, at the very same moment was handled perfectly by Google Chrome. Each time, I got my PDF file in less than 5 seconds.


Expected results:

Firefox should be designed with any kind of machine configuration (mine is "old": a 2011 Dell high-end laptop) and any kind of files (a 50 MB PDF file is not large by current standards) in mind...

My two cents (I apologize, they are not optimistic): since the switch to the new multi-threaded software architecture, I encounter a lot of usability problems like this. And each time Google Chrome delivers a far better result... This is sad: I need good tools to work with, and Firefox is less and less relevant to my work.

Thanks in advance for your help!

Comment 1

[Alice0775 White]

I can reproduce the super slow if e10s mode. And big spinner is spinning for long period when I open other tabs while the pdf is loading.

If disable e10s, it is faster as same as Chrome. And I can open other tabs properly while the pdf is loading.

https://hg.mozilla.org/mozilla-central/rev/99a239e1866a57f987b08dad796528e4ea30e622
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0 ID:20161020030211

Comment 2

[Julien Cristau [:jcristau] (back April 22)]

Mass wontfix for bugs affecting firefox 52.

Comment 3

[Brendan Dahl [:bdahl]]

Can you still reproduce the issue? Both PDF's seem pretty snappy for me.

Comment 4

[David Bourguignon]

Dear Brendan, thanks for your feedback. I confirm that the issue is no longer showing up: the bug seems to have been caught in the meantime... I suggest that we close this report.