Could someone please explain the significant difference in speed between a firefox updatepanel async postback and one performed in IE?
Average Firefox Postback Time For 500 objects: 1.183 Second
Average IE Postback Time For 500 objects: 0.295 Seconds
Using firebug I can see that the majority of this time in FireFox is spent on the server side. A total of 1.04 seconds.
Given this fact the only thing I can assume is causing this problem is the way that ASP.
Net renders its controls between the two browsers.
Has anyone run into this problem before?
VB.
Net Code
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
GridView1.DataBind()
End Sub
Public Function GetStockList() As StockList
Dim res As New StockList
For l = 0 To 500
Dim x As New Stock With {.Description = "test", .ID = Guid.NewGuid}
res.Add(x)
Next
Return res
End Function
Public Class Stock
Private m_ID As Guid
Private m_Description As String
Public Sub New()
End Sub
Public Property ID() As Guid
Get
Return Me.m_ID
End Get
Set(ByVal value As Guid)
Me.m_ID = value
End Set
End Property
Public Property Description() As String
Get
Return Me.m_Description
End Get
Set(ByVal value As String)
Me.m_Description = value
End Set
End Property
End Class
Public Class StockList
Inherits List(Of Stock)
End Class
Markup
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<script type="text/javascript" language="Javascript">
function timestamp_class(this_current_time, this_start_time, this_end_time, this_time_difference) {
this.this_current_time = this_current_time;
this.this_start_time = this_start_time;
this.this_end_time = this_end_time;
this.this_time_difference = this_time_difference;
this.GetCurrentTime = GetCurrentTime;
this.StartTiming = StartTiming;
this.EndTiming = EndTiming;
}
//Get current time from date timestamp
function GetCurrentTime() {
var my_current_timestamp;
my_current_timestamp = new Date(); //stamp current date & time
return my_current_timestamp.getTime();
}
//Stamp current time as start time and reset display textbox
function StartTiming() {
this.this_start_time = GetCurrentTime(); //stamp current time
}
//Stamp current time as stop time, compute elapsed time difference and display in textbox
function EndTiming() {
this.this_end_time = GetCurrentTime(); //stamp current time
this.this_time_difference = (this.this_end_time - this.this_start_time) / 1000; //compute elapsed time
return this.this_time_difference;
}
//-->
</script>
<script type="text/javascript" language="javascript">
var time_object = new timestamp_class(0, 0, 0, 0); //create new time object and initialize it
Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
function BeginRequestHandler(sender, args) {
var elem = args.get_postBackElement();
ActivateAlertDiv('visible', 'divAsyncRequestTimer', elem.value + '');
time_object.StartTiming();
}
function EndRequestHandler(sender, args) {
ActivateAlertDiv('visible', 'divAsyncRequestTimer', '(' + time_object.EndTiming() + ' Seconds)');
}
function ActivateAlertDiv(visstring, elem, msg) {
var adiv = $get(elem);
adiv.style.visibility = visstring;
adiv.innerHTML = msg;
}
</script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="click" />
</Triggers>
<ContentTemplate>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
</asp:UpdateProgress>
<asp:Button ID="Button1" runat="server" Text="Button" />
<div id="divAsyncRequestTimer" style="font-size:small;">
</div>
<asp:GridView ID="GridView1" runat="server" DataSourceID="ObjectDataSource1" AutoGenerateColumns="False">
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" SortExpression="ID" />
<asp:BoundField DataField="Description" HeaderText="Description"
SortExpression="Description" />
</Columns>
</asp:GridView>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
SelectMethod="GetStockList" TypeName="WebApplication1._Default">
</asp:ObjectDataSource>
</ContentTemplate>
</asp:UpdatePanel>
</form>
