imageworks/OpenShadingLanguage — pull request #423 by lgritz (2014-10-10 22:13:40+00:00)
Title: More noise SSE speedups.

There is an additional 3-5% speedup across various noise varieties resulting from a bit of refactoring to avoid repeated construction of float4's or int4's from individual floats or ints (like when you have 'f4 + 1.0'), and instead have those float or int constants look like static memory representation of the float4 or int4.