[Python-Dev] Add a frozendict builtin type (original) (raw)
Alex Gaynor alex.gaynor at gmail.com
Tue Feb 28 02:20:34 CET 2012
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Nick Coghlan <ncoghlan gmail.com> writes:
I'm pretty sure the PyPy jit can already pick up and optimise cases where a dict goes "read-only" (i.e. stops being modified).
No, it doesn't. We handle cases like a type's dict, or a module's dict, by having them use a different internal implementation (while, of course, still being dicts at the Python level). We do not handle the case of trying to figure out whether a Python object is immutable in any way.
Alex
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