Slowness with portals is something I've run into at a number of organizations. A typical situation is a user goes to the main landing page of the portal and then it sits there churning while everything is being evaluated behind the scenes. It finally loads anywhere from 20 - 30 seconds after the process is started. So we'll start with the basics and then get into some of the ways we've been able to identify slowness and hopefully speed things up again.
Let's start by digging into the analytics tools built into the portal. This is the clock icon that sits on the bottom left corner of the page for 'Performance Details':
Clicking that brings up the details panel modal
This panel gives us a breakdown of every widget sitting on the page and load times of the widgets. In addition, it gives an indicator if the widget was out of box (which could indicate a content issue) or a customized widget (which could be content or set up of the widget).
Clicking into the Widget Name will take you to the sp_config page to see the setup of the widget itself.
Selecting the instance routes us to the sp_instance page to see the specific version of the widget in use.
With the basics out of the way, we can look at some impacts that different choices make in portal performance.
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