Sergio Rael added the comment:
Sorry, this is not a deadlock. Python puts the CPU to 100% of usage, but it
takes so long that a I didn't know if it can finish the task.
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title: re.findall() deadlock on Python 3.6.10 -> re.findall() takes a long time
(100% cup usage) on Python 3.6.1
Rémi Lapeyre added the comment:
I don't think this is a deadlock rather it is certainly related to the number
of '*' there is in your pattern, the regexp has to search an exponentially
growing number of patterns.
You could try a simple pattern to match your attribute and it should be faster.
Sergio Rael added the comment:
Thank you for your reply Rémi.
I agree with you that the reason can be that the pattern is too complex. I just
noticed that in Python 3.7 using the same pattern finish the searchall almost
instantaneously, but in 3.6 the CPU goes to 100% and it takes ages to fin
Serhiy Storchaka added the comment:
It is hard to say what is the problem, but seems it was solved in 3.7. Either
it was an optimization, or a bug fix which had such side effect. If it was a
bug fix, it was one of backward incompatible bugfixes which are not backported
to older versions.
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