@theuntergeek, would _cache/clear have the same affect on field_stats? Because I've done that and it is still 1-2 seconds at most. The only time I've ever seen field_stats and an equivalent aggregation have the same speed is when the equivalent aggregation is in the query cache which never seems to happen under real-world conditions since the timespan is always changing. Otherwise, field_stats, with and without caching, has always been extremely faster than an aggregation.