Fiddler shows response time

function BeginRequestTime(oS: Session)
 {
     if (oS.Timers != null)
     {
         return oS.Timers.ClientBeginRequest.ToString();     
     }
     return String.Empty;
 }


  public static BindUIColumn("Time Taken")
            function CalcTimingCol(oS: Session){
              var sResult = String.Empty;
              if ((oS.Timers.ServerDoneResponse> oS.Timers.ClientDoneRequest))
              {
                sResult = (oS.Timers.ServerDoneResponse - oS.Timers.ClientDoneRequest) .ToString ();
              }
              return sResult;
            }





// just exit
 
      .
        

 

found on the Tool bar

Rules->CustomRules

Add inside class Handlers{