Помогите оптимизировать getDBO запрос - Общие вопросы веб разработки

<?php
$db = &JFactory::getDBO();
$tstsmls = $db->setQuery("SELECT SubmissionId FROM #__rsform_submissions WHERE UserId = 1")->loadColumn();
foreach  ($tstsmls as $tstsml) { ?>
                <div class="testimonial">
                    <div class="name"><?php echo $db->setQuery("SELECT FieldValue FROM #__rsform_submission_values WHERE SubmissionId = '$tstsml' AND FormID = 3 AND FieldName = 'Fullname'")->loadResult(); ?></div>
                    <div class="city"><?php echo $db->setQuery("SELECT FieldValue FROM #__rsform_submission_values WHERE SubmissionId = '$tstsml' AND FormID = 3 AND FieldName = 'City'")->loadResult(); ?></div>
                    <div class="message"><?php echo $db->setQuery("SELECT FieldValue FROM #__rsform_submission_values WHERE SubmissionId = '$tstsml' AND FormID = 3 AND FieldName = 'Message'")->loadResult(); ?></div>
                </div>
<?php } ?>

SELECT s.SubmissionId, v1.FieldValue AS Fullname, v2.FieldValue AS City
FROM #__rsform_submissions s
LEFT JOIN #__rsform_submission_values v1 USING(SubmissionId)
LEFT JOIN #__rsform_submission_values v2 USING(SubmissionId)
WHERE
    s.UserId = 1
    AND v1.FormID = 3
    AND v1.FieldName = 'Fullname'
    AND v2.FormID = 3
    AND v2.FieldName = 'City'
ORDER BY s.SubmissionId ASC

$tstsmls = json_decode(json_encode($db->loadObjectList()), true);
foreach  ($tstsmls as $tstsml) {
    echo $tstsml['Fullname'];
    echo $tstsml['City'];
}

$tstsmls = $db->loadObjectList();
foreach  ($tstsmls as $tstsml) {
    echo $tstsml->Fullname;
    echo $tstsml->City;
}