Johnson 2.0.0 prerelease 1

johnson version 2.0.0.pre1 has been released!

Johnson wraps JavaScript in a loving Ruby embrace. It embeds the Mozilla
SpiderMonkey JavaScript runtime as a C extension.

The 2.0.0 prerelese series include TraceMonkey, the evolution of
SpiderMonkey, which includes among other things a trace-based JIT
compiler for JavaScript. In current prereleases the JIT is enabled for
320bit builds and disabled for 64-bit builds (as they are in the Mozilla

This prerelease includes TraceMonkey from the Firefox 3.6 build branch
and fixes all known issues with split global support.

Since it’s a pre-release, you need to give gem the --prerelease flag to
install it, i.e.,

gem install johnson --prerelease

Because it’s a prerelease gem, you may need to manually install gem
dependencies. The gem install will tell you if you need to.

The prerelease code is in the unstable branch of the git repo.


=== 2.0.0.pre1 / 2010-02-11

  • Split global fix; covers all known issues
  • Fix build so enabling SM debugging doesn’t cause SEGVs
  • bring in patched SM 1.9.2 (from Firefox 3.6)