Python has lists and dicts, and lists don't get the per-item overhead of GC-ed keys. PyPy does better than CPython and implements specialised, low-overhead stor

Python has lists and dicts, and lists don't get the per-item overhead of GC-ed keys. PyPy does better than CPython and implements specialised, low-overhead storage for some dicts, lists and sets of uniform type (in 1.6, nightly builds, and a branch respectively). http://morepypy.blogspot.com/2011/10/more-compact-lists-with-list-strategies.html http://morepypy.blogspot.com/2011/10/more-compact-lists-with...