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Mon May 29 21:54:53 CEST 2006 · https://mail.python.org/pipermail/python-dev/2006-May/065360.html

Hi Raymond,

On Mon, May 29, 2006 at 12:20:44PM -0700, Raymond Hettinger wrote:
> > I've finally come around to writing a patch that stops dict lookup from
> > eating all exceptions that occur during lookup, like rare bugs in user
> > __eq__() methods. 
> 
> Is there a performance impact?

I believe that this patch is good anyway, because I consider my (and
anybody's) debugging hours worth more than a few seconds of a
long-running process.  You get *really* obscure bugs this way.

I would also point out that this is the kind of feature that should not
be traded off for performance, otherwise we'd loose much of the point of
Python.  IMHO.

As it turns out, I measured only 0.5% performance loss in Pystone.

A bientot,

Armin

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[Python-Dev] Let's stop eating exceptions in dict lookup