JQGrid重绘很慢

电网速度 直到我开始优化,才真正困扰我。

如果发现即使我有一个小网格(每页20个项目),悬停高亮显示是缓慢的,如果网格恰好需要一个滚动条在页面上,滚动页面是非常缓慢的。

我用的是jquery.ui.themecss。

为了确保页面上没有其他内容,我将网格的显示设置为“无”,页面像往常一样快速运行——正如我所怀疑的那样。

使用IE8调试器,我使用profiler来测量我的javascript和html的速度,这些速度非常快——所以它肯定是屏幕上的网格图。

我很感激任何和所有的帮助或建议,以提高性能。

我会附上我的网格定义(它相当大),以防你可能认为它可能存在:

$("#tblVariables").jqGrid({
        url: '/StudyAdmin/GetVariable.aspx?FilterType=' + Filter + '&SelectedFolder=' + SelectedFolder + '&SelectedGroup=' + SelectedGroup,
        datatype: "json",
        mtype: "POST",
        colNames: ['Variable Name', 'Hidden Original Text', 'Original Text', 'Label', 'Hidden', 'Groups', 'HiddenGroups'],
        colModel: [
            { name: 'VarName', index: 'VarName', editable: false },
            { name: 'VarOriginalText', index: 'VarOriginalText', hidden: true, editable: true, editrules: { edithidden: true} },
            { name: 'VarOriginalTextToShow', index: 'VarOriginalTextToShow', editable: false, sortable: false },
            { name: 'VarReportingText', index: 'VarReportingText', editable: true },
            { name: 'HiddenVar', index: 'HiddenVar', editable: true, edittype: "select", editoptions: { value: { "true": "True", "false": "False"}} },
            { name: 'Groups', index: 'Groups', editable: false },
            { name: 'HiddenGroups', index: 'HiddenGroups', hidden: true, editable: true, editrules: { edithidden: true} }
        ],
        editurl: "/StudyAdmin/Editvariable.aspx",
        height: "100%",
        gridComplete: function () {
            var grid = jQuery("#tblVariables");
            var ids = grid.jqGrid('getDataIDs');
            for (var i = 0; i < ids.length; i++) {
                var rowId = ids[i];
                var splitGroups = $('#tblVariables').getCell(rowId, 'HiddenGroups').split(",");
                if (splitGroups.length == 1 && splitGroups[0] == "") splitGroups = "";
                var GroupSelect = "<select id='Group_" + rowId + "' onchange='filterGroup(this)'>";
                if (splitGroups.length > 0) GroupSelect += "<option value='HasSelectGroup'>Select Group</option>";
                else GroupSelect += "<option value='NotHasSelectGroup'>No Groups</option>";
                for (var k = 0; k < splitGroups.length; k++) {
                    GroupSelect += "<option value='" + splitGroups[k] + "'>" + splitGroups[k] + "</option>";
                }
                //add all groups in here
                GroupSelect += "</select>";
                grid.jqGrid('setRowData', rowId, { Groups: GroupSelect });
            }
            setGridWidth($("#VariableGridContentConainer").width() - 19);
        },
        afterInsertRow: function (rowid, rowdata, rowelem) {
            $("#" + rowid).addClass('jstree-draggable');
        },
        ondblClickRow: function (id, ri, ci) {
            lastSelRow = id;
            $("#tblVariables").jqGrid('editRow', id, true);
        },
        onSelectRow: function (id) {
            if ($('#QuestionTree').find("#FQ" + id).attr("id") !== undefined) {
                $.jstree._focused().select_node("#FQ" + id);
            }
            if (id == null) {
                //$("#tblAnswers").setGridParam({ url: "/StudyAdmin/GetAnswers.aspx", page: 1 }).trigger('reloadGrid');
                $('#tblAnswers').GridUnload();
                loadAnswersGrid("-1");
            } else {
                //$("#tblAnswers").setGridParam({ url: "/StudyAdmin/GetAnswers.aspx?id=" + id, page: 1 }).trigger('reloadGrid');
                $('#tblAnswers').GridUnload();
                loadAnswersGrid(id);
                if (id && id !== lastSelRow) $("#tblVariables").jqGrid('saveRow', lastSelRow);
            }
        },
        viewrecords: true,
        rowNum: 20,
        loadonce: true,
        pager: jQuery('#pagernav'),
        sortname: 'VarName',
        sortorder: "asc",
        imgpath: '/Content/Images/',
        jsonReader: {
            root: "rows",
            page: "page",
            total: "total",
            records: "records",
            repeatitems: true,
            cell: "cell",
            id: "id"
        }
    });