slow search

function advanced_company_search() {
    if(isset($_GET['s'])) {
        // our advanced input boxes give us an array
        $filtered_search = array();
        $advanced_query = array(); // we will return this as our displayed search query
        $single_prefix = 'wpcf-';
        $multi_prefix = 'multi-'; // make sure it's the same prefix as above in prepare_company_data_for_advanced_search
        $postType = 'podjetje';
        // filter the $_GET vars into a secure array
        foreach ($_GET['s'] as $key => $value) {
            if (!empty($value)) {
                switch($key) {
            case 'region':
                        $field = 'regija';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Region', 'iwasc');
                        break;
            case 'municipality':
                        $field = $single_prefix.'obcina';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Municipality', 'iwasc');
                        break;
                    case 'name':
                        $field = $single_prefix.'ime';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Name', 'iwasc');
                        break;
                    case 'address':
                        $field = $multi_prefix.'naslov';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Address', 'iwasc');
                        break;
                    case 'telephone':
                        $field = $single_prefix.'telefon';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Telephone number', 'iwasc');
                        break;
                    case 'email':
                        $field = $single_prefix.'eposta';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('E-mail address', 'iwasc');
                        break;
                    case 'web':
                        $field = $single_prefix.'povezava';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Website URL', 'iwasc');
                        break;
                    case 'pin':
                        $field = $single_prefix.'maticna';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('PIN', 'iwasc');
                        break;
                    case 'tin':
                        $field = $single_prefix.'ddv_id';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Tax ID', 'iwasc');
                        break;
                    case 'iban':
                        $field = $multi_prefix.'iban'; // since we merged all of them we use another custom field name
                        $value = preg_replace('/ /', '', mysql_real_escape_string($value));
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('IBAN', 'iwasc');
                        break;
                    case 'bank':
                        $field = $multi_prefix.'banka'; // since we merged all of them we use another custom field name
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Bank', 'iwasc');
                        break;
                    case 'principal':
                        $field = $single_prefix.'glavna_dejavnost';
                        $filtered_search[$field] = mysql_real_escape_string($value);
                        $query = __('Principal occupation', 'iwasc');
                        break;
                    default:
                        $field = false;
                        $query = false;
                        $filtered_search[$field] = false;
                }
            }
            else {
                switch($key) {
            case 'region':
                        $field = 'regija';
                        $filtered_search[$field] = false;
                        $query = __('Region', 'iwasc');
                        break;
            case 'municipality':
                        $field = $single_prefix.'obcina';
                        $filtered_search[$field] = false;
                        $query = __('Municipality', 'iwasc');
                        break;
                    case 'name':
                        $field = $single_prefix.'ime';
                        $filtered_search[$field] = false;
                        $query = __('Name', 'iwasc');
                        break;
                    case 'address':
                        $field = $multi_prefix.'naslov';
                        $filtered_search[$field] = false;
                        $query = __('Address', 'iwasc');
                        break;
                    case 'telephone':
                        $field = $single_prefix.'telefon';
                        $filtered_search[$field] = false;
                        $query = __('Telephone number', 'iwasc');
                        break;
                    case 'email':
                        $field = $single_prefix.'eposta';
                        $filtered_search[$field] = false;
                        $query = __('E-mail address', 'iwasc');
                        break;
                    case 'web':
                        $field = $single_prefix.'povezava';
                        $filtered_search[$field] = false;
                        $query = __('Website URL', 'iwasc');
                        break;
                    case 'pin':
                        $field = $single_prefix.'maticna';
                        $filtered_search[$field] = false;
                        $query = __('PIN', 'iwasc');
                        break;
                    case 'tin':
                        $field = $single_prefix.'ddv_id';
                        $filtered_search[$field] = false;
                        $query = __('Tax ID', 'iwasc');
                        break;
                    case 'iban':
                        $field = $multi_prefix.'iban'; // since we merged all of them we use another custom field name
                        $value = preg_replace('/ /', '', false);
                        $filtered_search[$field] = false;
                        $query = __('IBAN', 'iwasc');
                        break;
                    case 'bank':
                        $field = $multi_prefix.'banka'; // since we merged all of them we use another custom field name
                        $filtered_search[$field] = false;
                        $query = __('Bank', 'iwasc');
                        break;
                    case 'principal':
                        $field = $single_prefix.'glavna_dejavnost';
                        $filtered_search[$field] = false;
                        $query = __('Principal occupation', 'iwasc');
                        break;
                    default:
                        $field = false;
                        $query = false;
                        $filtered_search[$field] = false;
                }
            }
            unset($key, $field, $query, $value);
        }
        unset($_GET['s']);
        $total = count($filtered_search);
        if ($total > 0) {
            $meta_query = array('relation' => 'AND');
            foreach($filtered_search as $key => $value) {
                array_push($meta_query, array(
                    'key' => $key,
                    'value' => $value,
                    'compare' => 'LIKE',
                    'type' => 'CHAR'
                ));
                unset($key, $value);
            }
            $search_args = array(
                'post_type' => $postType,
                'post_status' => 'publish', // else we get all the drafts as well :P
                'meta_query' => $meta_query,
        'post_per_page' => 10
            );
            $advanced_results = (in_array(true, $filtered_search)) ? new WP_Query($search_args) : false;
            return array($advanced_results, $advanced_query);
        }
        else {
            return false;
        }
    }
    else {
        return false;
    }
}