asp.net - jquery filter asp checkboxlist performance -


i filtering asp:checkboxlist of 2000 items , having performance problems. know lot of items, maybe code not ideal? if code fine, there other ways boost performance or pretty pushing limit? thank time:

  $('#tbsearchusers').bind('keyup', function (event) {             var query = $(this).val().tolowercase();              $('#cblusers input[type="checkbox"]').each(function () {                 var label = $("label[for='" + $(this).attr('id') + "']").text().tolowercase();                  if (label.indexof(query) > -1) {                     $(this).parent().parent().css('display', 'block');                 } else {                     //get parent tr , hide                     $(this).parent().parent().css('display', 'none');                 }             });   });


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