1.5 KiB
title: Top Packages Algorithm
Score
A package's score is currently equal to a pseudo rolling average of downloads. In the future, a package will also gain score through reviews.
Pseudo rolling average of downloads
Every package loses 5% of its score every day.
An open source package will gain 1 score for each unique download, whereas a non-free package will only gain 0.1 score.
This metric aims to be roughly equivalent to the average downloads.
Seeded using a legacy heuristic
The scoring system was seeded (ie: the scores were initially set to) 20% of an arbitrary legacy heuristic that was previously used to rank packages.
This legacy heuristic is as follows:
forum_score = views / max(years_since_creation, 2 weeks) + 80*clamp(months, 0.5, 6)
forum_bonus = views + posts
multiplier = 1
if no screenshot:
multiplier *= 0.8
if not foss:
multiplier *= 0.1
score = multiplier * (max(downloads, forum_score * 0.6) + forum_bonus)
As said, this legacy score is no longer used when ranking mods. It was only used to provide an initial score for the rolling average, which was 20% of the above value.
Manual adjustments
The admin occasionally reduces all packages by a set percentage to speed up convergence. Convergence is when
Transparency and Feedback
You can see all scores using the scores REST API, or by using the Prometheus metrics endpoint.
Consider suggesting improvements.