The only way of discovering the limits of the possible is to venture a little way past them into the impossible.

— Arthur C. Clarke               

7 Steps to a Faster Time Matters - Step 3

PowerViews can really drag down the performance of a list. Any time the list window needs to refresh, the processing load from every PowerViews is initiated.That's right, each PowerView is opened and read from beginning to end. Not just the default PowerView, every PowerView in the context folder.

The following functions effect the performance: 
1) First and foremost, the number of PowerViews
2) The speed of the network file access
3) Virus and script scanners monitoring HTML access

Many sites never attempt to resolve this issue because the impact is gradual or mostly just thought to be "part of the package". If you would like to test the impact on your Matter list performance, simply move the HTM files out of the following folder:   "\data\files\templates\powerviews\matter". Then start the Matter list again. If there is no discernable difference, put the HTM files back and have a nice day. If, howewever, you can discern an impact. copy back only those PowerViews the firm uses. Chances are many of them go unused anyway.