Normally, the Worker thread runs with the priority you specify with the "Default Worker thread priority" setting. However, when &xwp; finds out that the Worker thread cannot keep up with all the data that comes in, its priority is automatically raised temporarily. To be notified of these changes, you can enable this setting.
On most computers however, these priority changes will not occur frequently,
unless you populate folders with a lot of objects, because then
the Worker thread gets a stack of objects to remember at the same time.