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/