In the footer of most pages is a benchmark that displays the total time it took to process the page and how many SQL queries it took. Disabling this setting will hide that output.

<b>Note:</b> This option relies on the theme supporting this configuration setting. A theme can either choose to always show the link, use this setting, or never show the link. If you use third party themes then verify your settings are being applied properly. You may wish to contact the theme author if there are any problems.
 
<b>Recommendation:</b> Personal preference, do what you want.