[jira] [Assigned] (WICKET-5132) Evaluation of returned data (which includes alot of javascript) very slow after ajax call in IE10.

["Martin Grigorov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/WICKET-5132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martin Grigorov reassigned WICKET-5132:
---------------------------------------

    Assignee: Martin Grigorov
    
> Evaluation of returned data (which includes alot of javascript) very slow after ajax call in IE10.
> --------------------------------------------------------------------------------------------------
>
>                 Key: WICKET-5132
>                 URL: https://issues.apache.org/jira/browse/WICKET-5132
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket
>    Affects Versions: 6.0.0
>         Environment: IE10
>            Reporter: Bas Veenema
>            Assignee: Martin Grigorov
>              Labels: javascript, performance
>         Attachments: response_script.txt
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> We're using ajax to update a treetable. In IE10, when the ajax call returns the data, which contains alot of javascript code, processEvaluation in wicket-ajax-jquery.js stalls on var text = jQuery(node).text();
> In jQuery procedure Sizzle.getText is called, which eventually returns property elem.textContent. In IE10 this last statement takes about 26 seconds for our case while the same statement in chrome takes about 6 ms.
> It seems strange that IE10 takes this long to return the textContent of a node, but why is this necessary in the first place?
> The purpose of var text = jQuery(node).text() would be to get the text of the node. I think it would suffice to state var text = node.childNodes[0].nodeValue instead of var text = Query(node).text(), because the text is in the node itself, and it's not necessary to get the text from its descendants, because it has no descendants.
> In our case this modification improves the duration from 25915 ms to 8 ms in IE10.

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