Performance

Bottom of page testing info:

<!-- (<?php echo get_num_queries(); ?> queries in <?php timer_stop(1); ?> seconds uses <?php echo round(memory_get_peak_usage() / 1024 / 1024, 3); ?>MB peak memory -->

Or:

<!--
(<?php echo get_num_queries(); ?> queries in <?php timer_stop(1); ?>  seconds)
=TEMPLATE: <?php echo $GLOBALS['pagenow']; ?>
-->

Or:

<?php echo '<p>' . get_num_queries() . ' queries in ' . timer_stop() . ' seconds uses ' . round( memory_get_peak_usage() / 1024 / 1024, 3 ) . ' MB peak memory.</p>'; ?>

http://webpagetest.org

https://developers.google.com/speed/pagespeed/insights/