In this post we will discuss how to appear developer dashboard in custom master page in SharePoint 2010.
The Developer Dashboard is a user interface component built into SharePoint Foundation that displays diagnostic information that can be useful to developers and to farm administrators in diagnosing problems with the farm.
This gives us information about execution time, log correlation ID, critical events, database queries, service calls, SPRequests allocation and webpart events offsets etc.
By default Developer Dashboard appears on any page that uses the SharePoint Foundation 2010 master page or any page using a custom master page where the Dashboard control is included.
If you want to use developer dashboard on custom master pages, then we need to include the Developer Dashboard Launcher and the page rendering control that renders the output to the page.
We can put the Developer Dashboard Launcher on the master page.
And we can put the Page Rendering Control where we want this to appear and this will render the output to the page.
<SharePoint:DeveloperDashboard runat="server" />