[Python-ideas] Disable all peephole optimizations

[Nick Coghlan]

On 23 May 2014 06:27, "Ned Batchelder" <ned at nedbatchelder.com> wrote:
>
> On 5/22/14 2:57 PM, Eric Snow wrote:
>>
>> On Thu, May 22, 2014 at 12:49 PM, Eric Snow <ericsnowcurrently at gmail.com>
wrote:
>>>
>>> Same here.  More concretely:
>>
>> ...
>>
>> Having said that, revamping those options and our current optimization
>> mechanism is a far cry from just adding -X nopeephole as Ned has
>> implied.  While the former may make sense on its own, those broader
>> changes may languish as nice-to-haves.  It may be better to go with
>> the latter in the short-term while the broader changes swirl in the
>> maelstrom of discussion indefinitely.
>
>
> I get distracted (by work...) for the afternoon, and things take an
unexpected turn!
>
> I definitely did not mean to throw open the floodgates to reconsider the
entire -O switch.  I agree that the -O switch seems like too much UI for
too little change in results, and I think a different set of settings and
defaults makes more sense.  But I do not suppose that we have much appetite
to take on that large a change.
>
> For my purposes, an environment variable and no change or addition to the
switches would be fine.

Given how far away 3.5 is, I'd actually be interested in seeing a full
write-up of Eric's proposal, comparing it to the "let's just add some more
technical debt to the pile" -X option based approach.

I don't think *anyone* really likes the current state of the optimisation
flags, so if this proposal tips us over the edge into finally fixing them
properly, huzzah!

Cheers,
Nick.

>
> --Ned
>
>> -eric
>>
>
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