spirit v2 vs v3 performance comparison?

Hi,

I googled around but didn't find anything obvious.  Has anyone done a
performance comparison of v2 to v3 spirit?

boost-spirit.com hasn't had a blog post for years :)

Thanks in advance,

-- Richard

-- 
"The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline>
             The Terminals Wiki <http://terminals-wiki.org>
     The Computer Graphics Museum <http://ComputerGraphicsMuseum.org>
  Legalize Adulthood! (my blog) <http://LegalizeAdulthood.wordpress.com>