getResources very slow using dynamic calls

[[!getCategory?&mode=`display`]]

[[!getResources:default=`

Sorry - No Contractors Found for Category.

`? &tpl=`contractorList` &processTVs=`1`&parents=`59` &includeTVs=`1`&limit=`50` &tvPrefix=`` &sortby=`pagetitle` &sortdir=`ASC`&tvFilters=`Category==[[!getCategory]],Category!==''`&showHidden=`true`&hideContainers=`true`&includeTVList=`Address,Category,Contact Person,Email,Fax,Logo,Phone,Website`]]

if($mode!='display') {
  $cats = explode('||', $modx->runSnippet('listMyResources',array('parent' => 37, 'list' => 'true')));
}
if(isset($_GET['Category']) && $_GET['Category']!='') {
if($mode=='display') {
      return htmlentities($_GET['Category']);
} else {
      if(in_array($_GET['Category'], $cats)) {
         return '%'.htmlentities($_GET['Category']).'%';
      } else {
           return 'Please Select a Category.';
      }
}
} else {
      return 'Please Select a Category.';
}

<?php
$parent = $modx->getOption('parent',$scriptProperties,9);
$list = $modx->getOption('list',$scriptProperties, 'true');
$parentObj = $modx->getObject('modResource',$parent);
if (!($parentObj instanceof modResource)) { return ''; }
$resArray = $parentObj->getMany('Children');
$resources = array();
foreach($resArray as $res) {
  if ($res instanceof modResource) {
    if($res->get('hidemenu')!=1 && $res->get('alias')!='all-contractors') {
       $cat[] = $res->get('pagetitle');
       $resources[] = $res->get('pagetitle') . '==' . $res->get('pagetitle');
    }
  }
}
$out = implode("||",$resources);
$cat = implode("||", $cat);
if($list == 'true') {
   return $cat;
} else {
   return $out;
}