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Thread: [4.x] Serious performance issues under IE 8

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    Exclamation [4.x] Serious performance issues under IE 8

    Originally posted here earlier today : http://www.sencha.com/forum/showthre...ues-under-IE-8

    Update, using EXTJS Example "EXTJS Theme" as the test case.


    Im seeing serious performance issues under IE 8 using 4.0.0

    Using Chrome, EXTJS is lightning fast! (much faster than in EXTJS 3.3)

    Using FF 3.6, performance is not far off Chrome but Im seeing a little performance degradation when layouts get more complex.

    Using IE 8, large layouts/apps are basically unusable.

    I've tried other Machines (VM's and Physical) and I'm still seeing the same performance problems under IE 8.

    See attached video...
    Part 1: EXTJS Theme running under 3.3 (8 seconds load time)
    Part 2: EXTJS Theme running under 4.0.0 (33 seconds load time)

    Hope this helps.
    Attached Files Attached Files

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    I would try running IE8 in No Add-ons mode to be certain no toolbars/addons are affecting load times.

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    Quote Originally Posted by latenightcoder View Post
    I would try running IE8 in No Add-ons mode to be certain no toolbars/addons are affecting load times.
    Thanks for the suggestion but Ive already tested IE on other machines (fresh installations without any add ons).

    The only thing I've not tried (but will later today) is hosting EXTJS 4.0.0 on a different system. I could be an issue with Tomcat, however with Chrome and FF working fine against that box, Im not hopeful.

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    We hade similar issues... restart IE and don't start the developertool.. that solved it for us.. IE8 developer tool seems to mess things up sometimes..

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    Ive spent a number of days looking at this and unfortunately I've been unable to isolate the IE performance issues to anything other than the new EXTJS Framework.

    In brief I've tried the following.

    Running IE 7/8 on my local host and against ETXJS 4.0 and 3.3 installed locally (my dev box)
    Code:
    Existing installation of IE 8 > 4.0 > major performance issues
    Existing installation of IE 8 (with Add ons disabled) > 4.0 > major performance issues
    Fresh installation of IE 8 > 4.0 > major performance issues
    
    Existing installation of IE 8 > 3.3 > no performance issues
    Existing installation of IE 8 (with Add ons disabled) > 3.3 > no performance issues
    Fresh installation of IE 8 > 3.3 > no performance issues
    Running IE 7/8 on various VMs and physical boxes against ETXJS 4.0 and 3.3 installed on my dev box
    Code:
    Fresh installation of IE 7 > 4.0 > major performance issues
    Fresh installation of IE 8 > 4.0 > major performance issues
    Fresh installation of IE 8 > 3.3 > no performance issues
    Running IE 8 on my local host and against ETXJS 4.0 hosted by Sencha
    Code:
    Existing installation of IE 8 > 4.0 > major performance issues
    Existing installation of IE 8 (with Add ons disabled) > 4.0 > major performance issues
    Fresh installation of IE 8 > 4.0 > major performance issues
    Running IE 7/8 on various VMs and physical boxes against ETXJS 4.0 hosted by Sencha
    Code:
    Fresh installation of IE 7 > 4.0 > major performance issues
    Fresh installation of IE 8 > 4.0 > major performance issues
    Is no one else seeing issues with IE?

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    IE9 doesn't perform well at all for me...

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    Is there anyone that is running IE with extjs 4.0 that is seeing acceptable performance (ie similar to 3.3.3)?

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    Quote Originally Posted by MrSparks View Post
    Originally posted here earlier today : http://www.sencha.com/forum/showthre...ues-under-IE-8

    Update, using EXTJS Example "EXTJS Theme" as the test case.


    Im seeing serious performance issues under IE 8 using 4.0.0

    Using Chrome, EXTJS is lightning fast! (much faster than in EXTJS 3.3)

    Using FF 3.6, performance is not far off Chrome but Im seeing a little performance degradation when layouts get more complex.

    Using IE 8, large layouts/apps are basically unusable.

    I've tried other Machines (VM's and Physical) and I'm still seeing the same performance problems under IE 8.

    See attached video...
    Part 1: EXTJS Theme running under 3.3 (8 seconds load time)
    Part 2: EXTJS Theme running under 4.0.0 (33 seconds load time)

    Hope this helps.
    Pretty sure that says load time. So how am I confusing the issues here? Plus you will need both load/init time with app performance time the suspendLayouts, and etc.

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    This thread has mentioned both load and render performance problems. As I posted several weeks ago,:

    I looked at the time required just to load ext-all.js and not render any components. v4.1.0 indeed takes almost twice as long as v3.4.0, however, removing this time and comparing just the time to then render the equivalent themes examples still shows 4.1.0 48% slower than 3.4.0. This is on IE8.

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    Quote Originally Posted by rich02818 View Post
    This thread has mentioned both load and render performance problems. As I posted several weeks ago,:

    I looked at the time required just to load ext-all.js and not render any components. v4.1.0 indeed takes almost twice as long as v3.4.0, however, removing this time and comparing just the time to then render the equivalent themes examples still shows 4.1.0 48% slower than 3.4.0. This is on IE8.
    Have you tried the suspendLayouts in 4.1 with that example to see what the difference is?

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