The developer dashboard was a great new feature when SP2010 was released, and now with SP2013 it has been further improved, with the key changes being:

• The Dashboard now appears in a separate window - it isn’t rendered out at the bottom of the page you are diagnosing any more.

• Cumulative page requests are shown, instead of just the last request.  This certainly helps in SP2013 given the use of Minimal Download Strategy (MDS).

A new code sample has been released on MSDN that demonstrates how to return search results in an app for SharePoint.

“The SearchApp sample accepts a query using the keyword query language (KQL) syntax as an input. It subsequently makes a call to the search engine using the search Representational State Transfer (REST) service. The results are then displayed in a table, which is built dynamically using JQuery and JavaScript.”

The Developer Dashboard is one of my favourite troubleshooting tools for SP2010.

The great aspect about the Dev Dashboard is that it allows you to see how long each of your web parts are taking to load on a page, in addition to individual SQL queries and stored proc executions.

Now you can easily figure out which web parts are causing problems so that you can fix them, or hand them off to your developers to fix.