It is hard to tell from some of the release statements when they mean a particular thing is an improvement over CPython or over previous performance by PyPy, e.g.:

>Specialized list implementation. There is a branch that implements lists of integers/floats/strings as compactly as array.array. This should drastically improve performance/memory impact of some applications

Is this improvement over CPython or over previous implementation in PyPy? There are several such comments.