DetectGeoWithServer was doing GeoIP-first (DNS lookup per node) then falling back to name regex. For a 148-node collection with rename enabled, this meant 148 serial DNS queries in the rename pass alone (28s on slow DNS).
Reverse the priority: try name-based regex first (instant, no I/O), only fall back to GeoIP+DNS when the node name has no recognizable country keywords. Most proxy names already contain country/city info.
Also add in-memory DNS cache in geoip.LookupHost so repeated lookups for the same hostname don't re-resolve.
Collection preview with rename: 30s -> 3s.
rogee
8e449c8531