We have identified an issue caused by the rider list which can cause the dashboard to load much slower when there are a large number of riders in the server. For some people, the dashboard still loads fine but for some it is slower.
We have added a performance mode setting to the settings page which will disable some components on the dashboard page to allow it to load much faster.
There are some other things to try if you don't want to enable performance mode.
1. Try another browser. It is very common that this will fix many issues immediately.
2. Close unused tabs. Unused tabs can hog browser resources and cause the dashboard to perform slowly.
3. Try a mobile device. Many mobile device browsers work better with the dashboard than traditional PC browsers. This is because they are more efficient in the way they load page elements.