skirpichev/sympy — pull request #2 by smichr (2013-03-21 19:46:29+00:00)
Title: use _omatch to do order expr simplification

See what you think about these mods (there are more than just the omatch changes). series runs about 5% faster, just the order tests run about 10% faster, and the omatch is about 10X faster than using pattern matching.