Message 63271 - Python tracker

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Author	gvanrossum
Recipients	amaury.forgeotdarc, gvanrossum, jek, rhettinger
Date	2008-03-05.00:12:29
SpamBayes Score	0.014048479
Marked as misclassified	No
Message-id	<ca471dc20803041612x3447f223xcd88a287e09e8be8@mail.gmail.com>
In-reply-to	<1204675534.46.0.248429057265.issue2235@psf.upfronthosting.co.za>

Content
> I noticed that my patch uses Py_TYPE(self)->tp_hash, whereas normal > processing of slot_tp_hash() uses lookup_method(self,"__hash__",hash_str). > > I am almost sure that both expressions return the same value. > Is this correct? Py_TYPE(self)->tp_hash seems much faster. HERE BE DRAGONS There are cases where Py_TYPE(self)->tp_hash is the function currently executing (some wrapper(s) in typeobject.c). OTOH, lookup_method(...) finds the Python code in the class __dict__s along the MRO.

>  I noticed that my patch uses Py_TYPE(self)->tp_hash, whereas normal
>  processing of slot_tp_hash() uses lookup_method(self,"__hash__",hash_str).
>
>  I am almost sure that both expressions return the same value.
>  Is this correct? Py_TYPE(self)->tp_hash seems much faster.

HERE BE DRAGONS

There are cases where Py_TYPE(self)->tp_hash is the function currently
executing (some wrapper(s) in typeobject.c). OTOH, lookup_method(...)
finds the Python code in the class __dict__s along the MRO.

History
Date	User	Action	Args
2008-03-05 00:12:30	gvanrossum	set	spambayes_score: 0.0140485 -> 0.014048479 recipients: + gvanrossum, rhettinger, amaury.forgeotdarc, jek
2008-03-05 00:12:29	gvanrossum	link	issue2235 messages
2008-03-05 00:12:29	gvanrossum	create