https://bugzilla.wikimedia.org/show_bug.cgi?id=13063

Max Semenik <maxsem.w...@gmail.com> changed:

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--- Comment #9 from Max Semenik <maxsem.w...@gmail.com> 2011-11-06 14:21:37 UTC 
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This patch has a few deficiencies:
1) It doesn't take table prefixes into account.
2) It counts the exact number of people watching the page FOR EVERY ROW in
result set while you only need to know whether this number is equal to zero or
not.
3) Depnding on how much slower are subqueries after (2) is resolved, you may
need to go as far as introduce a rc_watched column to cache these results.

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