This release includes a whole lot of bug fixes but also some new features, such as:
- Performance improvements, particularly around method invocation
- The socket module now includes ipv6 and Internationalized Domain Names (RFC 3490) support
- Improved startup time
Jython 2.5.2 now runs the richards benchmark 3x faster than Jython 2.5.1. It's also about 20% faster than 2.5.1 at running pybench.
Admittedly richards and pystone aren't the greatest Python benchmarking suites out there, but they're what we've historically kept close eyes on. We're aiming to monitor more, better benchmarks (i.e. those @ http://speed.pypy.org ) in the future.