Bill,
On 15.11.2015 23:36, Bill Deegan wrote:
Greetings,
Thought I'd take a whack at running SCons on pypy (based on a presentation at
SFPython where the developer say 50x CPython speeds).
Anyway it turns out that using __slots__ + assiging to __class__ which we do a
few places in the Node's classes causes:
TypeError: __class__ assignment: 'Entry' object layout differs from 'Dir':
I hopped on #pypy and a developer there took a quick look as said turning of
__slot__ got it a bit further through.
As a side note, the canonical way to tell if you are running under pypy is as
follows:
if '__pypy__' not in sys.builtin_module_names
Anyone have any thoughts on the relative difficulties of disabling slots for
pypy vs removing reassigning an objects class in the
Nodes hierarchy?
since you're only interested in the possible speedup of pypy vs. cpython, wouldn't it be an option to use a commit short before the
introduction of "__slots__" and apply the PR #252 there in a sandbox?
Then you could first check whether following this route, and fixing things for
the __class__ assignments, would be worthwhile...
Best regards,
Dirk
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