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Home / 2012 / 6 /

Anders Hattestad

Jun 5, 2012

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Log how long a page takes to generate

After a project goes live there is often some debate if the site is fast enough. With today’s heavy use of JavaScript a lot is done after the page is loaded so it’s difficult for a user to actually know if it’s the rendering/JavaScript or the page generating that takes time.

In a project of mine we had terrible lag, and load time experienced for the users was very high. I wrote a small report that saved hourly the count of load time grouped by 1,2,3,4,5+ seconds.

After I had let that code run for some hours I saw that the generating time from the server was not the problem. The actually problem was that the client didn’t cache the image resource files that were in use. I had overlooked the new (?) section in IIS7, so I changed my web.config to

    <caching>
      <profiles>
        <add extension=".gif" policy="CacheForTimePeriod" kernelCachePolicy="DontCache" duration="01:01:00" location="Any" />
        <add extension=".png" policy="CacheForTimePeriod" kernelCachePolicy="DontCache" duration="01:01:00" location="Any" />
        <add extension=".js" policy="CacheForTimePeriod" kernelCachePolicy="DontCache" duration="01:01:00" location="Any" />
        <add extension=".css" policy="CacheForTimePeriod" kernelCachePolicy="DontCache" duration="01:01:00" location="Any" />
        <add extension=".jpg" policy="CacheForTimePeriod" kernelCachePolicy="DontCache" duration="01:01:00" location="Any" />
        <add extension=".jpeg" policy="CacheForTimePeriod" kernelCachePolicy="DontCache" duration="01:01:00" location="Any" />
      </profiles>
    </caching>

And the clients got a huge boost in load time.

The little plugin works like this:

In my master page I added this code to Render

Code Snippet

public partial class UDMaster : System.Web.UI.MasterPage,IHaveProperties
{
    DateTime start = DateTime.Now;
 
    protected override void Render(HtmlTextWriter writer)
    {
        if (PageTimesGrouped.SavePageTimesGrouped())
        {
            PageTimesGrouped.Add(((TimeSpan)(DateTime.Now - start)));
        }

The Dynamic DataStore class looks like this. I save only one row pr hour so this code will not generate a lot of rows. It will only save down to the DDS base if it gets a request for a new hour.

Code Snippet

[EPiServerDataStore(AutomaticallyRemapStore = true, AutomaticallyCreateStore = true)]
public class PageTimesGrouped : BaseData<PageTimesGrouped>
{
        [EPiServerDataIndex]
    public DateTime Date { get; set; }
 
    public int Bellow1s { get; set; }
    public int Count_1s_2s { get; set; }
    public int Count_2s_3s { get; set; }
    public int Count_3s_4s { get; set; }
    public int Count_4s_5s { get; set; }
    public int Above5s { get; set; }
 
       
    static PageTimesGrouped _currentTime;
    public static PageTimesGrouped CurrentTime()
    {
        var now = DateTime.Now;
        if (_currentTime == null)
        {
            _currentTime = new PageTimesGrouped() { Date = new DateTime(now.Year, now.Month, now.Day, now.Hour, 0, 0), Bellow1s = 0, Count_1s_2s = 0, Count_2s_3s = 0, Count_3s_4s = 0, Count_4s_5s = 0, Above5s = 0 };
        }
        if (_currentTime.Date.Hour != now.Hour)
        {
            _currentTime.Save();
            _currentTime = new PageTimesGrouped() { Date = new DateTime(now.Year, now.Month, now.Day, now.Hour, 0, 0), Bellow1s = 0, Count_1s_2s = 0, Count_2s_3s = 0, Count_3s_4s = 0, Count_4s_5s = 0, Above5s = 0 };
        
        }
        return _currentTime;
    }
    public static void Add(TimeSpan span)
    {
        try
        {
            var a = CurrentTime();
            if (span.TotalMilliseconds < 1000)
                a.Bellow1s++;
            else if (span.TotalMilliseconds < 2000)
                a.Count_1s_2s++;
            else if (span.TotalMilliseconds < 3000)
                a.Count_2s_3s++;
            else if (span.TotalMilliseconds < 4000)
                a.Count_3s_4s++;
            else if (span.TotalMilliseconds < 5000)
                a.Count_4s_5s++;
            else
                a.Above5s++;
        }
        catch { }
    }
    public static bool SavePageTimesGrouped()
    {
        string tmp = System.Web.Configuration.WebConfigurationManager.AppSettings.Get("SavePageTimesGrouped");
        if (!string.IsNullOrEmpty(tmp))
            return true;
        return false;
    }
    public decimal RequestPrMin
    {
        get
        {
            var count = Bellow1s + Count_1s_2s + Count_2s_3s + Count_3s_4s + Count_4s_5s + Above5s;
            var now = DateTime.Now;
            var naa = new DateTime(now.Year, now.Month, now.Day, now.Hour, 0, 0);
            if (Date > now.AddHours(1))
                return count / (60);
            var a = now.Minute - Date.Minute;
            if (a > 0)
                return count / a;
            return -1;
        }
    }
 
}

 The Report plugin looks like this

Code Snippet

[GuiPlugIn(
    Area = PlugInArea.ReportMenu,
    DisplayName = "ShowPageInfo grouped",
    Url = "~/Custom/AdminPages/ShowPageTimesV2.aspx")]
public partial class ShowPageTimesV2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Bind();
    }
 
    void Bind()
    {
        CurrentList.DataSource = new object[] { PageTimesGrouped.CurrentTime() };
        CurrentList.DataBind();
        List2.DataSource = (from item in PageTimesGrouped.Items orderby item.Date descending select item).Take(100);
        List2.DataBind();
    }
}

with front code like this

Code Snippet

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ShowPageTimesV2.aspx.cs" Inherits="UDFase1.Custom.AdminPages.ShowPageTimesV2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<body>
    <form id="form1" runat="server">
    <div>
   SavePageTimesGrouped=<%=Itera.Data.PageTimesGrouped.SavePageTimesGrouped()%><br />
   
   <asp:Literal ID="DebugLit" runat="server" />
 
    <table border="1">
                <tr>
                    <th>Dato</th>
                    <th>Less 1s</th>
                    <th>1s-2s</th>
                    <th>2s-3s</th>
                    <th>3s-4s</th>
                    <th>4s-5s</th>
                    <th>Abvoe 5s</th>
                </tr>
 
     <asp:Repeater ID="CurrentList" runat="server">
 
        <ItemTemplate>
            <tr>
                <td><%#Eval("Date") %></td>
               <td><%#Eval("Bellow1s")%></td>
                <td><%#Eval("Count_1s_2s")%></td>
                <td><%#Eval("Count_2s_3s")%></td>
                <td><%#Eval("Count_3s_4s")%></td>
                <td><%#Eval("Count_4s_5s")%></td>
                <td><%#Eval("Above5s")%></td>
                <td><%#Eval("RequestPrMin") %></td>
 
            </tr>
        </ItemTemplate>
     
    </asp:Repeater>
 
 
     <asp:Repeater ID="List2" runat="server">
      
        <ItemTemplate>
            <tr>
                <td><%#Eval("Date") %></td>
               <td><%#Eval("Bellow1s")%></td>
                <td><%#Eval("Count_1s_2s")%></td>
                <td><%#Eval("Count_2s_3s")%></td>
                <td><%#Eval("Count_3s_4s")%></td>
                <td><%#Eval("Count_4s_5s")%></td>
                <td><%#Eval("Above5s")%></td>
                <td><%#Eval("RequestPrMin") %></td>
 
            </tr>
        </ItemTemplate>
 
    </asp:Repeater>
     </table>
    
                          
      
    </div>
    </form>
</body>
</html>

Jun 05, 2012

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