julianshapiro/velocity — pull request #49 by tomByrer (2014-05-09 23:13:09+00:00)
Title: swap / for * & >>1

http://jsperf.com/multiply-vs-divide/14
Untested, more for discussion. Seems most of the math would be used in tight loops. Hopefully commented in plain math-lish. Only affecting mobile (where speed increases & saving battery are helpful) & Safari.