Introducing the WatchMouse Site Performance Index

The WatchMouse Site Performance Index (SPI) represents the relative web site performance of sites.

The SPI research is performed in 28 Sectors and 12 Countries. For each sector in each country, the main web sites of a set of representative organisations are tracked.

In this research, the performance in terms of: load time, speed and availability are measured. These figures are then used in a formula that represents the users' perceptions of waiting time, and compares these with the results of competitors in the same SPI category.

Why is the WatchMouse SPI important?

A poorly performing website has a very negative impact on customer experience. Customers tend to rate a site badly when it loads slowly, and worse still, if it is unavailable.

The WatchMouse Site Performance Index site gives you a quick overview of trends in relative performance across sectors and countries.