[Bug 32561] Re: Pango-enabled firefox is much slower
This bug has been reported on the Ubuntu ISO testing tracker. A list of all reports related to this bug can be found here: http://iso.qa.ubuntu.com/qatracker/reports/bugs/32561 ** Tags added: iso-testing -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/32561 Title: Pango-enabled firefox is much slower To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/32561/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
ffox 2 won't see any non-critical fixes anymore. ** Changed in: firefox (Ubuntu) Status: Confirmed = Won't Fix ** Changed in: firefox (Baltix) Status: New = Invalid -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 32561] Re: Pango-enabled firefox is much slower
On Sun, Jan 13, 2008 at 11:21:24PM -, Alexey Spiridonov wrote: I looked at firefox-3.0 also. The results are not bad, but not perfect either: 1) The original e-mail renders quickly and correctly, regardless of MOZ_DISABLE_PANGO (it's unclear if the switch has any effect at all now) 2) The sanitized e-mail that I attached renders fast. However, it produces a gigantic area of no refresh on the screen. As in, there's a part of the message that just keeps whatever was on that part of the screen before Firefox. And then, when you scroll, that part gets smeared around. This sounds like a X driver bug. Do you use XAA as accellmethod on your xorg.conf? if you have a driver that can do EXA, try that and let us know if your issues goes away. Thanks, - Alexander -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
I looked at firefox-3.0 also. The results are not bad, but not perfect either: 1) The original e-mail renders quickly and correctly, regardless of MOZ_DISABLE_PANGO (it's unclear if the switch has any effect at all now) 2) The sanitized e-mail that I attached renders fast. However, it produces a gigantic area of no refresh on the screen. As in, there's a part of the message that just keeps whatever was on that part of the screen before Firefox. And then, when you scroll, that part gets smeared around. -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 32561] Re: Pango-enabled firefox is much slower
On Fri, Jan 11, 2008 at 03:06:31PM -, jojo4u wrote: 3.0~alpha8+nobinonly-0ubuntu1 is not affected. Both settings of MOZ_DISABLE_PANGO bottom out at 2.6 seconds with quite a bit variation upwards. Firefox 2.0.0.11 is 3.7/1.8 seconds and Swiftfox is 1.4 seconds at the moment. OK, then lets say this is fixed in firefox 3 affects ubuntu/firefox-3.0 status fixreleased Thanks, - Alexander ** Changed in: firefox-3.0 (Ubuntu) Status: Incomplete = Fix Released -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
3.0~alpha8+nobinonly-0ubuntu1 is not affected. Both settings of MOZ_DISABLE_PANGO bottom out at 2.6 seconds with quite a bit variation upwards. Firefox 2.0.0.11 is 3.7/1.8 seconds and Swiftfox is 1.4 seconds at the moment. -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
On Sat, Dec 29, 2007 at 01:04:15PM -, Vytas wrote: FWIW, the extreme slowness with multiple tabs seems to be gone with MOZ_DISABLE_PANGO=1 too ok affects ubuntu/firefox status confirmed can you please test if firefox-3.0 works better affects ubuntu/firefox-3.0 status incomplete Thanks, - Alexander ** Changed in: firefox (Ubuntu) Assignee: Ian Jackson (ijackson) = (unassigned) ** Changed in: firefox (Ubuntu) Status: New = Confirmed ** Also affects: firefox-3.0 (Ubuntu) Importance: Undecided Status: Incomplete -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
I am seeing this on 7.10 Gutsy Gibbon, Firefox 2.0.0.11, and it showed up in a very nasty way. I have an e-mail (see attachment) with lots and lots of text (data files). Opening this e-mail in its original context -- Yahoo mail with its CSS and JS and tables -- caused the browser to effectively hang. It remained non-responsive and at 100% CPU for over 5 minutes. The sanitized version does eventually render, but takes over a minute on my computer. In contrast, with pango disabled (I started with mozilla.com's stock builds, then tried the MOZ_PANGO_DISABLE=1 hack, both work fine), the original e-mail renders in about 15 seconds. The sanitized version renders in about 3. So, using Pango is over 20 times slower for me! On the other hand, the font rendering without Pango does not match the rest of the system (fonts are different/larger; some are badly hinted). So, it's ugly without Pango, and unstable (yes, unstable, because such a hang makes me kill the browser) with. :( Can I do something to help get this fixed? ** Attachment added: Sanitized e-mail with massive performance problems. http://launchpadlibrarian.net/11088176/firefox-performance.html.gz -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
I second that. I did the same test like jojo4u, I get 9.9 sec with Pango and 5.3 sec without. Also, Firefox is very slow when multiple tabs with flash are open (might be different bug, might be related). Gutsy, FF 2.0.0.11 ** Changed in: firefox (Ubuntu) Status: Fix Released = New -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
FWIW, the extreme slowness with multiple tabs seems to be gone with MOZ_DISABLE_PANGO=1 too -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
I'am affected on Xubuntu 7.10 (upgraded from 7.04). Firefox version is 2.0.0.6+2nobinonly-0ubuntu1. Disabling pango by MOZ_DISABLE_PANGO=1 doubles speed on a local copy of http://scragz.com/tech/mozilla/test-rendering-time. That means from 6.8 s to 3.2 s. My /etc/environment says: LANG=en_US.UTF-8. -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
** Also affects: firefox (Baltix) Importance: Undecided Status: New -- Pango-enabled firefox is much slower https://bugs.launchpad.net/bugs/32561 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
A late Hello... just curious.. has anyone addressed or investigated David Finch's issue of the Mozilla build being significantly faster even with Pango disabled? Or should this be a seperate bug? I reran my benchmark on this system to test pango enabled vs disabled: Dapper build, with pango enabled: 32.3 seconds Dapper build, with pango disabled: 25.0 seconds, noticeably faster Official linux build from Mozilla: 12.7 seconds, a 2x improvement over disabling pango There may be more to the problem than pango, it seems. -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
(alternately, form teams and conduct an undercover mission to determine what Pango is up to and why it's so slow...) -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: [Bug 32561] Re: Pango-enabled firefox is much slower
On Tue, Sep 12, 2006 at 06:07:23PM +0100, Ian Jackson wrote: Ian Jackson writes (Re: [Bug 32561] Re: Pango-enabled firefox is much slower): I'll check to see if the latest betas have the patch discussed there included; I'm not sure, because it's listed as `Trunk'. If so then we could turn off our hack (which en/disable pango depending on the locales). I'm afraid that 2.0b2 doesn't even have the files mentioned in the patch on the upstream bug (Mozilla Bugzilla 334064, attachment id 233172). So we can't drop our pango-disablement change yet. OK, thanks for looking into it. -- - mdz -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: [Bug 32561] Re: Pango-enabled firefox is much slower
Ian Jackson writes (Re: [Bug 32561] Re: Pango-enabled firefox is much slower): I'll check to see if the latest betas have the patch discussed there included; I'm not sure, because it's listed as `Trunk'. If so then we could turn off our hack (which en/disable pango depending on the locales). I'm afraid that 2.0b2 doesn't even have the files mentioned in the patch on the upstream bug (Mozilla Bugzilla 334064, attachment id 233172). So we can't drop our pango-disablement change yet. Ian. -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
** Changed in: firefox (upstream) Status: Confirmed = Fix Released -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: [Bug 32561] Re: Pango-enabled firefox is much slower
On Sun, Aug 20, 2006 at 08:54:50PM -, Noumaan Yaqoob wrote: We already have a bug report filed #54091. But the solution to our problem lies right here. How Ubuntu decides to deal with this bug directly affects the Urdu Font rendering and Firefox performance issues for us. Thank you; please continue any discussion in bug #54091 and refer to this bug there fro background. -- - mdz -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: [Bug 32561] Re: Pango-enabled firefox is much slower
On Dom, 2006-08-20 at 20:54 +, Noumaan Yaqoob wrote: We already have a bug report filed #54091. But the solution to our problem lies right here. How Ubuntu decides to deal with this bug directly affects the Urdu Font rendering and Firefox performance issues for us. I think an important variable to know here is how does the upstream binary version of firefox copes with Urdu font rendering? And what about its performance doing so? -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: [Bug 32561] Re: Pango-enabled firefox is much slower
On Sun, Aug 20, 2006 at 01:27:35AM -, Noumaan Yaqoob wrote: Actually what firefox does is that it displays the page with out Pango most urdu pages remain readable but firefox uses someother font like Tahoma (if installed) and it even renders Tahoma badly for urdu. I don't quite understand how this patch works. I assume that by Installing Urdu language packs from Language Selector we would be able to use pango system wide? This isn't about the performance issue; please file a separate bug about the Urdu issues. -- - mdz -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
Matt actually our problem is directly related to the patch applied here. If we enable Pango by adding: MOZ_DISABLE_PANGO=0 We would be able to render Urdu Pages but our Firefox would be a lot more slower and consuming 100% cpu resources at times. I have noticed that with Pango enabled firefox crashes quite often and that it is certainly not an acceptable compromise. We already have a bug report filed #54091. But the solution to our problem lies right here. How Ubuntu decides to deal with this bug directly affects the Urdu Font rendering and Firefox performance issues for us. -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
It seems that the fix released is actually stopping web pages in Urdu Fonts to display correctly in Firefox, Epiphany, Mozilla Thunderbird. However it does not effects Galeon. When I tried Firefox after adding: MOZ_DISABLE_PANGO=0 in /etc/environment It started rendering Urdu web pages perfectly. What does it mean? Well whatever it does, it is surely stopping a whole lot of people who read Urdu web pages using Firefox, seeing that their beloved web browser in Ubuntu doesn't display their language they would prolly switch back. another interesting thing that happened after trying this solution was that Galeon inherited firefox's behavior. -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
BBCUrdu seems to be rendering without any obvious (eg, boxes) problems for me with Pango disabled (though I know nothing about the language), but we probably should err on the side of safety here. Ian, could you consider adding Urdu to the list of locales requiring Pango? -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 32561] Re: Pango-enabled firefox is much slower
Actually what firefox does is that it displays the page with out Pango most urdu pages remain readable but firefox uses someother font like Tahoma (if installed) and it even renders Tahoma badly for urdu. I don't quite understand how this patch works. I assume that by Installing Urdu language packs from Language Selector we would be able to use pango system wide? -- Pango-enabled firefox is much slower https://launchpad.net/bugs/32561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
