Performance - Page Contains Dynamic Elements - Loading Takes Time

I am dynamically creating a table of checkboxes on my test.aspx page. The dimensions (row and column count) of the table are determined by querying the database. In test.aspx page, I do the following:

<script language="C#" runat="server">
protected void Page_Load ( object src, EventArgs e ) {
//Query the database to get the data for rows and columns
CheckBox[] chkBox = new CheckBox[rows * columns]; //creates a collection of checkboxes
//Iterate over the query set in a double for loop to create dynamic checkboxes
}
</script>

Right now I have the number of rows=20 and columns=10, but it can increase (with the columns more likely). I used the Net tab in Firebug to ascertain the time taken by different events and found that GetTest.aspx is taking close to 4 minutes, which is too long a time to wait. Is there a way to being down the page load time? Is my approach to create dynamic check boxes correct?