Javascript performance issue in Chrome about mage-enhanced-admin-grids HOT 5 CLOSED

As there is no delay when just using the core (as far as I know / have tested), it would depend on whether the extension you use is rather common or not, and if enabling the extension on the corresponding grids has an actual added value. Otherwise, it would be simpler to just turn off their rewrites (and in the case of a common extension, maybe add them by default to the exceptions list).

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The extension in question is custom code that was written for the client. It adds three more grids to the product edit form, much like cross sells or upsells. The extension looks like a fairly standard admin grid implementation, nothing out of the ordinary. As the custom code provides significant business value for the customer, disabling it isn't an option. Adding those three grids to the exclusions list for CustomGrid makes the problem go away, but does not resolve the underlying issue.

I am happy to try and extract the minimal amount of custom code from this client's site to reproduce the issue if that helps.

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When I was talking about turning off the rewrites, I meant to disable the corresponding custom grids (in System > Custom Grids > List), sorry for the misunderstanding :)

And concerning a minimal piece of code allowing to reproduce the issue, if you can extract it then yes it would be really welcome, as that may finally furthermore allow to find a potentially more general problem. Thanks !

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I've noticed performance problems with grids in combination with the adminhtml/widget_grid_serialize block, if on-ajax not only the grid is reloaded but the serialize block is loaded again it causes performance problems in javascript.

Example XML

    <adminhtml_inventoryupdates_product>
        <block type="core/text_list" name="root" output="toHtml">
            <block type="ho_inventoryupdates/adminhtml_inventoryupdates_edit_tab_product" name="ho_inventoryupdates_edit_tab_product" />
            <block type="adminhtml/widget_grid_serializer" name="product_grid_seralizer">
                <reference name="product_grid_seralizer">
                    <action method="initSerializerBlock">
                        <grid_block_name>ho_inventoryupdates_edit_tab_product</grid_block_name>
                        <data_callback>getSelectedProducts</data_callback>
                        <hidden_input_name>links[qtys]</hidden_input_name>
                        <reload_param_name>products</reload_param_name>
                    </action>
                </reference>
            </block>
        </block>
    </adminhtml_inventoryupdates_product>

    <adminhtml_inventoryupdates_productgridonly>
        <block type="core/text_list" name="root">
            <block type="ho_inventoryupdates/adminhtml_inventoryupdates_edit_tab_product" name="ho_inventoryupdates_edit_tab_product" />
        </block>
    </adminhtml_inventoryupdates_productgridonly>

Not sure if it is related, but though I'd share my experience. :)

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@paales great observation. That's exactly what's happening in our situation! Thanks for your assistance! 👍

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