Script taking too long to run when TimeAxis used in Chart

[CarlosG]

I have a simple chart with dates on the horizontal axis. When I use a CategoryAxis like below, everything works fine.

new CategoryAxis()
{
   Title = "Sampling Date",
   Position = Position.Bottom,
   Grid = true,
   Fields = new string[] { "SamplingDate" },
   Label = new AxisLabel()
   {
      Font = "10px Arial",
      Rotate = new RotateAttribute() { Degrees = 270 },
      Renderer =
      {
         Handler = "return Ext.util.Format.dateRenderer('d-M-Y')(value);"
      }
   }
}

However, when I switch to a TimeAxis, like below, I get a script that takes too long to execute.

new TimeAxis()
{
   Title = "Sampling Date",
   Position = Position.Bottom,
   Grid = true,
   Fields = new string[] { "SamplingDate" },
   DateFormat = "d-M-Y",
   Label = new AxisLabel()
   {
      Font = "10px Arial",
      Rotate = new RotateAttribute() { Degrees = 270 },
   }
}

The warning I get is:

[Baidaly]

Hello!

Welcome to our forum!

Could you provide a full sample to reproduce?

[CarlosG]

Hi Baidaly,

Thanks for your response.

This chart belongs to a rather large application that I've been working on.

I'll endeavour to "extract" a self-contained sample that reproduces the problem and post it as soon as I can.

Cheers

[CarlosG]

UPDATE:

I figured this one out myself.

It seems that if no StepUnit parameter is specified, Ext would try to automatically create optimal major and minor tick marks and on a long time-span it would take many cycles to process.

The simple way I found to correct this was to add the StepUnit parameter. The modified code is below.

new TimeAxis()
{
   Title = "Sampling Date",
   Position = Position.Bottom,
   Grid = true,
   Fields = new string[] { "SamplingDate" },
   AdjustMinimumByMajorUnit = true,
   StepUnit = DateUnit.Year,
   MinorTickSteps = 11,
   DateFormat = "dd-MMM-Y",
   AutoDataBind = true,
   Label = new AxisLabel()
   {
      Font = "10px Arial",
      Rotate = new RotateAttribute() { Degrees = 270 }
   }
}

I hope someone finds this useful.

Cheers.

[Baidaly]

Thank you for update!