https://bugzilla.wikimedia.org/show_bug.cgi?id=45973
Web browser: ---
Bug ID: 45973
Summary: Math caching recently broken
Product: MediaWiki extensions
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Math
Assignee: [email protected]
Reporter: [email protected]
Classification: Unclassified
Mobile Platform: ---
Recent upgrades (circa March 6, 2013 or a little before) seem to have broken
the math caching system in some way.
The key symptom is that pages with many new / recently added equations take a
very long time to save / preview. It appears that the math formulas are being
repeatedly regenerated on each save even though they ought to be stored after
the first run.
However, it also appears that old pages still render quickly. In other words,
it appears that Mediawiki knows that previously cached formulas are still
cached but it isn't placing new formulas into the caching system correctly.
Examples:
Good version with old formulas that renders quickly:
http://en.wikipedia.org/wiki/User:Dragons_flight/math1
Requires 1.1 s to preview
Bad version with new formulas that renders slowly:
http://en.wikipedia.org/wiki/User:Dragons_flight/math2
Requires 47.5 s to preview
Both times are based on the "served by" comment in the HTML source generated
after preview. The only difference between the pages is that all instances of
<math> ... </math> have been replaces with <math> ... = 1 </math> in the new
version in order to create "new" equations.
Related complaints:
http://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(technical)&oldid=543209802#Posting_to_the_math_reference_desk_is_really_slow
http://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(technical)&oldid=543209802#Technical_difficulty_with_editing_ring_.28mathematics.29
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