Context menu displays slow

[Andrew Kitchens]

After upgrading from 2010.1.309.35 to 2010.2.929.35 the rad context menu takes 6 seconds to display.
The menu is displayed using menu.showAt(x,y) in javascript. On click the menu is cleared, new items added and then displayed.
Any ideas why it stopped working?

function buildbluemenu(result) {
    contextMenu.get_items().clear();

    var setupmenu = new Telerik.Web.UI.RadMenuItem();
    setupmenu.get_groupSettings().set_offsetX(5);
    setupmenu.set_text("Setup");
    setupmenu.set_imageUrl(rootPath + "Images/icons/Setup.gif");
    contextMenu.get_items().add(setupmenu);

    var pointeditormenu = new Telerik.Web.UI.RadMenuItem();
    pointeditormenu.get_groupSettings().set_offsetX(5);
    pointeditormenu.set_text("Point Editor");
    setupmenu.get_items().add(pointeditormenu);

    var trendeditormenu = new Telerik.Web.UI.RadMenuItem();
    trendeditormenu.get_groupSettings().set_offsetX(5);
    trendeditormenu.set_text("Trend Editor");
    setupmenu.get_items().add(trendeditormenu);

    var alarmeditormenu = new Telerik.Web.UI.RadMenuItem();
    alarmeditormenu.get_groupSettings().set_offsetX(5);
    alarmeditormenu.set_text("Alarm Editor");
    setupmenu.get_items().add(alarmeditormenu);

    var runtimemenu = new Telerik.Web.UI.RadMenuItem();
    runtimemenu.get_groupSettings().set_offsetX(5);
    runtimemenu.set_text("Runtime Chart");
    runtimemenu.set_imageUrl(rootPath + "Images/icons/Runtime.gif");
    contextMenu.get_items().add(runtimemenu);

    var schedulemenu = new Telerik.Web.UI.RadMenuItem();
    schedulemenu.get_groupSettings().set_offsetX(5);
    schedulemenu.set_text("Schedules");
    schedulemenu.set_imageUrl(rootPath + "Images/icons/Schedules.gif");
    contextMenu.get_items().add(schedulemenu);

    var trendmenu = new Telerik.Web.UI.RadMenuItem();
    trendmenu.get_groupSettings().set_offsetX(5);
    trendmenu.set_text("Trends");
    trendmenu.get_groupSettings().set_offsetX(5);
    trendmenu.set_imageUrl(rootPath + "Images/icons/Chart.gif");
    contextMenu.get_items().add(trendmenu);

    var alarmmenu = new Telerik.Web.UI.RadMenuItem();
    alarmmenu.get_groupSettings().set_offsetX(5);
    alarmmenu.set_text("Alarms");
    alarmmenu.set_imageUrl(rootPath + "Images/icons/Alarms.gif");
    contextMenu.get_items().add(alarmmenu);

    var notesmenu = new Telerik.Web.UI.RadMenuItem();
    notesmenu.get_groupSettings().set_offsetX(5);
    notesmenu.set_text("Notes");
    notesmenu.set_imageUrl(rootPath + "Images/icons/Note.gif");
    contextMenu.get_items().add(notesmenu);

    var commandmenu = new Telerik.Web.UI.RadMenuItem();
    commandmenu.get_groupSettings().set_offsetX(5);
    commandmenu.set_text("Command");
    commandmenu.set_imageUrl(rootPath + "Images/icons/Command.gif");
    contextMenu.get_items().add(commandmenu);

    // Command menu
    if (commandable == true) {
        commandmenu.enable();
    } else {
        commandmenu.disable();
    }

    // Schedule menu
    var isSchedule = $(result).find('IsSchedule').text();

    if (isSchedule == 1) {
        schedulemenu.enable();
    } else {
        schedulemenu.disable();
    }
    result = $(result);

    // Alarmmenu
    var counter = 0;
    alarmmenu.disable();
    $(result).find('Alarm').each(function() {
        counter++;
    });

    if (counter > 0) {
        alarmmenu.enable();
    }

    // Trendmenu
    counter = 0;
    trendmenu.disable();
    $(result).find('Trend').each(function() {
        counter++;
        var trendid = $(this).find('Id').text();
        var childItem = new Telerik.Web.UI.RadMenuItem();
        childItem.set_text($(this).find('Description').text());
        childItem.set_value("TrendId:" + trendid);
        trendmenu.get_items().insert(i, childItem);
    });

    if (counter > 0) { trendmenu.enable(); }

    // Done building, display the menu.
    contextMenu.showAt(x, y);
}

[Dimitar Terziev]

Hello Andrew,

Unfortunately we couldn't reproduce the problem , everything is working fine with your script on our test page.
The context menu is created relatively fast on both Mozilla Firefox and IE.
Would you be so kind to send us a liveUrl to your page in order to investigate the problem on your side.

Greetings,
Dimitar Terziev
the Telerik team

[Ragnar]

Hello.

I have a similar problem (see: http://www.telerik.com/community/forums/aspnet-ajax/menu/performance-issue-when-dynamically-adding-items-to-a-radcontextmenu-in-the-client.aspx)  Has this problem been resolved? 

Best regards,
Ragnar

[Peter]

Hello Ragnar,

If you need to load a lot of items on the client, I recommend you consider using RadMenu with Web Service.


Kind regards, Peter
the Telerik team