if you bucket, the stats will have very less data to compare, I have done it in some of my graphs where the granular level details doesn't really affect the final outcome very much.
e.g.consider on 17th you may have 1000 events.
if you do a stats then it will go through each timestamp to findout which is the min and max rather the first and last. But if you bucket it to 1 hours and considering 50 events per hour the stats input will become only 20 events which is faster right? this is what i understand and in my dashboard it takes way less when i compare monthly data.
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