A thought on reducing startup time is to default the display of System trust to only show discrepancies. An additional action would be required to include trusted files in the display.

1. Trusted files are less interesting
2. The mass of trusted files is usually where latency comes from
3. We dont have an "Untrust" action, so there is nothing you can do with a trusted file anyways

An additional action to show trusted could be

1. "Show all" check box
2. Use of the search field

This is targeting the latency in the table model and view only, the backend would still generate all metadata.