https://bugzilla.wikimedia.org/show_bug.cgi?id=21860

--- Comment #19 from Aaron Halfaker <[email protected]> 2010-07-14 
15:49:02 UTC ---
> This bug was closed exactly because it will put an extra load on database, not
> due to bandwidth issues.

John Erling Blad's proposal to generate the checksums only when requested
should not significantly increase database load.  In general, hashing
algorithms are O(n) (linear) in complexity (very fast, even for large text
chunks).  The requested checksums could be cached to improve the performance,
but given the speed at which checksums (even the "heavy" ones) can be
generated, this benefit is likely to be small at best. 

I was under the impression that this bug was closed because the developers
either deemed that it was in unimportant new feature to support and/or not
worth developer time.  I cannot argue with that.  Database load, on the other
hand, is not a good reason to close this bug.

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