sluggish performance with multiple overloads

my system's response always becomes sluggish when the intellisense window popups with a large list of intellisense. The case in which i notice it the most is with my Convert.ToXXX functions:

User.OrganizationId = Convert.ToInt32(dr["OrganizationId"], CultureInfo.InvariantCulture);

everything gets quite sluggish as I try to type through it and intellisense tries to keep up.