How to speed up combobox binding

How to speed up combobox binding in windowformapplication

var list=ds.Tables[0].AsEnumerable()
		        .Select(r => r.Field<string>("job")).ToArray();
	          
			combobox.BeginUpdate();
			combobox.DisplayMember = "job";
			combobox.ValueMember = "job";
			combobox.DataSource = new BindingSource(list,null);
			combobox.EndUpdate();

In this below line,it is taking time to bind and it s very slow.. How to make it fast

 combobox.DataSource = new BindingSource(list,null);