Mike Jolley (a11n)

Testing your WordPress site? This plugin allows you to display memory, page load time and query count in the footer of your site on both the front-end and within admin.
This plugin is partly based upon the WP Query Counter by Steven Word (http://www.stevenword.com/plugins/wp-query-counter/) and has been customised for my testing needs.
If you’d like to contribute to the plugin you can find it on GitHub: <a href="https://github.com/mikejolley/WP-Page-Load-Stats" rel="nofollow ugc">https://github.com/mikejolley/WP-Page-Load-Stats</a>

WP Page Load Stats

Not sure why this only has 100+ users but this is a great tool!

Excellent!

Display memory, page load time, average load time and query count in the footer of your site.

Simon99

Update the WordPress default memory limit. Never run into the dreaded “allowed memory size of 33554432 bytes exhausted” error again!
The default WordPress memory limit is sometimes not enough, especially if you have a lot of plugins installed. This plugin allows you to increase the memory limit without editing any WordPress files.

Change Memory Limit

Update the WordPress default memory limit. Never run into the dreaded "allowed memory size of 33554432 bytes exhausted" error again!

WP Page Load Stats vs Change Memory Limit