a major refactoring of the compiler tool chain that results in
faster builds, especially for large projects,
significant performance improvements across the board,
-and support for Solaris and Google's Native Client architecture (NaCl).
+and support for Solaris, Plan 9 and Google's Native Client architecture (NaCl).
It also has an important refinement to the memory model regarding synchronization.
As always, Go 1.3 keeps the <a href="/doc/go1compat.html">promise
of compatibility</a>,
Go 1.3 now includes experimental support for Solaris on the <code>amd64</code> (64-bit x86) architecture.
</p>
+<h3 id="plan9">Support for Plan 9</h3>
+
+<p>
+Go 1.3 now includes experimental support for Plan 9 on the <code>386</code> (32-bit x86) architecture.
+</p>
<h3 id="win2000">Removal of support for Windows 2000</h3>