openlayers/ol3 — pull request #1221 by twpayne (2013-11-04 10:21:28+00:00)
Title: Round with bitwise OR

This is a micro-optimization that I had lying around on my disk for a few months. Rounding with `| 0` is significantly fast that using `Math.round` on [most platforms](http://jsperf.com/math-floor-vs-math-round-vs-parseint/70), subject to the constraint that the result is a valid integer. This is case in several places in ol3.