https://bugzilla.wikimedia.org/show_bug.cgi?id=58952

--- Comment #5 from ssas...@wikimedia.org ---
It looks like jsdiff is the culprit at least in rt-testing for inefficient
processing of some pages -- main cause for both long processing times + memory
usage (peak 2.3g virtual, 1.3g resident) on the plwiki test page.

----------------------
[subbu@earth tests] time node roundtrip-test.js --prefix itwiki
Campionato_Dilettanti_1958-1959 > /dev/null
completed parsing of itwiki:Campionato_Dilettanti_1958-1959 in 45254 ms
after parse: Thu Dec 26 2013 15:48:46 GMT-0600 (CST)
wt2html + html2wt time: 49303
after serialization before rt-diff: Thu Dec 26 2013 15:48:49 GMT-0600 (CST)
after jsdiff: Thu Dec 26 2013 15:51:12 GMT-0600 (CST)
after convert-diff: Thu Dec 26 2013 15:51:12 GMT-0600 (CST)
before double-rt-diff: Thu Dec 26 2013 15:51:13 GMT-0600 (CST)
before checkIfSignificant: Thu Dec 26 2013 15:51:55 GMT-0600 (CST)
159.505u 1.272s 3:58.13 67.5%    0+0k 0+0io 0pf+0w
----------------------

Relevant entry for plwiki:Podsumowanie_startów_zespołu_Lotus_w_Formule_1

----------------------
after serialization before rt-diff: Thu Dec 26 2013 15:56:42 GMT-0600 (CST)
after jsdiff: Thu Dec 26 2013 16:03:40 GMT-0600 (CST)
----------------------

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