.. this is a revision shortly after release-2.1-beta
.. startrev: 4eb52818e7c0
+.. branch: sanitise_bytecode_dispatch
+Make PyPy's bytecode dispatcher easy to read, and less reliant on RPython
+magic. There is no functional change, though the removal of dead code leads
+to many fewer tests to execute.
Fast json decoder written in RPython, about 3-4x faster than the pure Python
decoder which comes with the stdlib