this post was submitted on 11 Jun 2023
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Never understood this on Reddit either… What’s the difference between “Top” and “Hot”?
"Top" sorts by comments with the most upvotes. "Hot" are new comments that are receiving upvotes quickly (at least on Reddit).
"Hot" has some time-weighting, while "Top" is strictly ordered by karma
The beauty of open-source. We can view the code that does it. "Hot" is basically just a ratio of votes over time with some weighted factors involved.
Rank = ScaleFactor * sign(Score) * log(1 + abs(Score)) / (Time + 2)^Gravity
https://github.com/LemmyNet/lemmy/blob/ecc9469a02e63eab4e19093007c7ba6db0dca079/migrations/2019-03-30-212058_create_post_view/up.sql#LL8C2-L8C2