[issue27898] regexp performance degradation between 2.7.6 and 2.7.12

[Steve Newcomb]

Steve Newcomb added the comment:

On 09/01/2016 05:01 PM, Steve Newcomb wrote:
>
>> The outputs show that 2.7.12's re.sub() takes 1.2 times as long as 
>> 2.7.6's.  It's a significant difference, but...
>>
>> ...it was not the dramatic degradation I expected to find in this 
>> exercise.
On second (third?) thought, the degree of degradation could easily 
depend on the source data being processed.  Maybe test.py does, in fact, 
demonstrate the problem, but the test data I used (p17-118.htm) do not 
demonstrate a terribly severe case of the problem.

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<http://bugs.python.org/issue27898>
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