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    Quote Originally Posted by tjstuart View Post
    The reason I won't move beyond 2.3 (yet). 2.3 was a great release. None of the goodies in later versions have warranted a move IMO.

    I do hope things improve beyond v4.
    Will v2.3 run in IE9?

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    Quote Originally Posted by stahlman View Post
    @stevil,
    Given what we've been hearing, I would say you are an incorrigible optimist... ;-) I think it's safe to say that 2.3 performance levels are a pipe dream at this point... Also, you seem to have misunderstood Don's position on performance baseline. (Either that or I have...) If I understood his post correctly, he considers 4.1 - not 3.4.0 - to be the performance baseline; hence, my concerns about "moving goalposts"...
    I am an incorrigible optimist, thanks for noticing!

    I don't know how Don's baseline can be 4.1, as it hasn't released yet - 3.4.0 is the most recent non-4 release against which to compare performance?

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    Quote Originally Posted by stevil View Post
    I am an incorrigible optimist, thanks for noticing!

    I don't know how Don's baseline can be 4.1, as it hasn't released yet - 3.4.0 is the most recent non-4 release against which to compare performance?
    @stevil,
    While I don't claim to agree with the logic behind it, here's the statement from Don upon which I based my conclusions:
    The "performance baseline" we have right now is 4.1 PR1. So it is a blocker to regress from there. This is currently based on measuring the Themes example and a few others.

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    Quote Originally Posted by rich02818 View Post
    Will v2.3 run in IE9?
    I'm guessing it will 'run'. That's not to say you won't run into rendering issues. You'd probably want to look at what changed from 3.3 to 3.4 for IE9 support to see if you'd need to make similar changes for 2.3.

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    Would be interested to know if 2.3 runs under IE 9 also.

    Had a quick look at the online 2.3 examples under IE8 and it seems nice and fast. Will have to benchmark and see if 2.3 if the best route for my app.

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    Quote Originally Posted by MrSparks View Post
    Would be interested to know if 2.3 runs under IE 9 also.

    Had a quick look at the online 2.3 examples under IE8 and it seems nice and fast. Will have to benchmark and see if 2.3 if the best route for my app.
    This is what we do for our 2.3 code...

    <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7,chrome=1" />

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    @beavx420,

    Many thanks for that

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    Apologies as I seem to have taken this thread OT. However, i'll answer the questions raised ...

    2.3 works perfectly in all IEs if you send the right doctype or meta tag.

    IE <= 8 send <meta http-equiv="X-UA-Compatible" content="IE=7" />
    IE > 8 send <!DOCTYPE html>

    In fact, IE9 rendering was comprable to Firefox in terms of speed.

    For example, a screen in one of our apps (200 widgets approx incl. grids, tabpanels, form elements etc) ...

    IE7 683ms
    IE8 589ms
    IE9 216ms
    FF5 192ms
    Chrome13 84ms

    There's also a few tweaks you can apply to Ext.lib.Event (which may not be in the official release; listener cache as an object vs array, _getCacheIndex, add/removeListener etc) which speed things up enormously, prevent memory blowout in long running enterprise apps and reduce the likelihood of the "Stop running this script" warning one typically receives on big destroys.

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    Quote Originally Posted by tjstuart View Post
    There's also a few tweaks you can apply to Ext.lib.Event (which may not be in the official release; listener cache as an object vs array, _getCacheIndex, add/removeListener etc) which speed things up enormously, prevent memory blowout in long running enterprise apps and reduce the likelihood of the "Stop running this script" warning one typically receives on big destroys.
    Sorry for offtop, but where to find these tweaks?

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    It will be a big problem for Sencha if the developers decide to switch to the very all 2.3 version.
    This just show how wrong was the decision of releasing Ext 4.0 just to be on schedule, with the framework completely unstable.

    I hope you Sencha guys learn from this mistake.
    Ext is terrific!!