[wp-meta] [Making WordPress.org] #2604: Plugin Search ranking for plugins with more than 1 million installs broken

[Making WordPress.org]

#2604: Plugin Search ranking for plugins with more than 1 million installs broken
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 Reporter:  gibrown           |      Owner:
     Type:  defect            |     Status:  new
 Priority:  high              |  Milestone:  Plugin Directory v3.0
Component:  Plugin Directory  |   Keywords:
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 The ranking function for plugin installs only considered the active
 install range from 0 to 1 million. The recent-ish change that has some
 plugins at over 1 million (6 total) has caused their scores to be
 significantly dropped (by about 48%). Effectively, it makes a 3 million
 install plugin look like a 90k install plugin.

 The cause is a hack that provides more differentiation between plugins
 with 100k installs and 1m installs. Rather than the curve being
 logarithmic in this range it is linear. To fix it we only apply that hack
 when active installs are less than 1m. Above 1m the curve is logarithmic
 again so that the high install plugins don't get boosted by too much.

 installs  : multiplier
 100k : 3.23801591197
 500k : 4.1940446601
 1mil : 5.18081720924
 2mil : 5.44074702695
 3mil : 5.59279631749
 10mil : 6.04428594411

 This fix shouldn't ever break in the same way. It may not be ideal for
 differentiation between high install plugins, but there are not that many
 of them right now, so it's a problem for ten years from now.

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Ticket URL: <https://meta.trac.wordpress.org/ticket/2604>
Making WordPress.org <https://meta.trac.wordpress.org/>
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