openlayers/ol3 — pull request #1330 by twpayne (2013-12-04 11:01:17+00:00)
Title: Don't use WebGL if there as a major performance caveat

See http://blog.tojicode.com/2013/12/failifmajorperformancecaveat-with-great.html .

As we have a fallback to Canvas, it makes sense not to use WebGL if performance will be poor.