It seems like many of those issues could be worked around if mediawiki/core
kept a simple "uses math markup" boolean for each page. All the overhead
of MathJax could be eliminated unless it was actually needed. Further, the
javascript could be wrapped in a big if clause, so if the browser supported
MathML natively, mathjax could similarly be skipped. This provides a
future path to fastness as browsers improve.
--scott
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(
http://cscott.net)