'juju status' caches the list of space names. #11260
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Checklist
Description of change
Rather than mapping from space-id to space-name for each interface, do
a single query load, and then pull the space names out of the map.
QA steps
On a controller with many machines (1000 in a model), do 'juju status'. It should return quickly. You can also use 'mongotop' to see that we are making a lot of reads against the spaces collection.
Documentation changes
None.
Bug reference