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  • Lee Kelleher 4026 posts 15836 karma points MVP 13x admin c-trib
    Oct 06, 2009 @ 14:14
    Lee Kelleher
    0

    Firefox uses near 100 percent CPU

    There is an old forum post about Firefox hitting 100% CPU when viewing the Umbraco back-end.

    forum.umbraco.org/...irefox-uses-near-100-CPU.aspx

    Recently, I have been experiencing the same thing.  I log into the back-end and after a while my CPU hits 100% and I need to kill Firefox.

    Here is my set-up:

     

    • Umbraco 4.0.2.1
    • Window XP SP3
    • Firefox 3.5.3 (recently upgrade from 3.0.14, as I thought this might be a Firefox bug)
    • Firefox plug-ins: Web Developer toolbar and IE View
    • Disabled Firefox plug-ins: Firebug  (I disabled this as I have heard it could cause memory leaks)

     

    I've had this issue happen across a few different Umbraco installs... so it's not just a "bad install".

    Any one else experiencing this? or even re-produce this?

    Thanks,

    - Lee

  • Douglas Robar 3570 posts 4711 karma points MVP ∞ admin c-trib
    Oct 06, 2009 @ 14:19
    Douglas Robar
    0

    I've experienced it as well. It only seems to be Firefox/Win that does this. All other browsers on Windows and all browsers on Mac do not spike the CPU. Thus, when I'm on Windows I use Safari or IE for the umbraco admin and Firefox for viewing my website (so that I have access to firebug).

    I seem to recall this might be related to the treeview on the left side of the umbraco admin ui. As that code has been entirely rewritten for umbraco 4.1 this problem should go away (along with some really cool features, like remembering the nodes that were expanded when you switch sections).

    cheers,
    doug.

  • Timsn 121 posts 231 karma points
    Oct 06, 2009 @ 14:37
    Timsn
    1

    I've got the same effect here on Windows Vista with Firefox 3.5.3

    This is a bug reported earlier, so we can hope that it's gone with Umbraco 4.1 as Douglas said.

    Can't wait for the new treeview :)

  • Shannon Deminick 1526 posts 5272 karma points MVP 3x
    Oct 06, 2009 @ 16:03
    Shannon Deminick
    1

    Perhaps it might be related to the old treeview but I think it's more to do with the window resizing events that take place... hopefully they're ironed out in 4.1

    ... but yes the tree is MUCH nicer :)

  • William Charlton 171 posts 218 karma points
    Oct 26, 2012 @ 18:35
    William Charlton
    0

    Did anyone work out what was going on here?

    I built a site some time back, no doubt using Firefox as it tends to be my dev browser (add ons etc...). It's running on win server 2003.

    I have since upgraded to FF 16 and now when I log in to admin I get the loading "barbers" bar and a status saying the page is being loaded, then it refreshes and seems to start again and again and again. It is completely unusable.

    Chrome of course is fine.

    Any ideas?

    P.S the above mentioned site is a "How to install Umbraco" site where I have documented our experiences and woes, to help others. We stopped the build on it as it seemed that UMB 5 was going to take over. Three cheers (or more) to the brave souls who fessed up to 5 being a bad move. Umbraco 4 is dead - long live Umbraco 4.

  • William Charlton 171 posts 218 karma points
    Oct 26, 2012 @ 18:47
    William Charlton
    0

    I now have something even wierder. After posting the last post, I had the same thing with this page, it would load and reload. I disabled all my add-ons and had the same thing. Maybe it is my Firefox install?

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