mozilla/pdf.js — pull request #4434 by p01 (2014-03-10 15:04:34+00:00)
Title: Jbig2 optimizations

~13% speed improvement in JBIG2 decoding.

Measured 10x the decoding time of ten 33M pixels JBIG2 images:
Average decoding time went from ~1440ms to ~1270ms in Opera, and ~1240ms to ~1060ms in Aurora