Grizzly 2.0 is here!
By alexismp on Mar 20, 2011
As it is often the case with Grizzly, performance is a key improvement and Oleksiys shares some informal yet very encouraging results in his blog post.
Given the timing, this version clearly didn't make it into GlassFish 3.1 (which uses Grizzly 1.9.32). If you're really interested in testing out the newer 2.0, there is an unsupported way to add it to your existing 2.x or 3.x GlassFish, check out the mailing list archives.