[issue16465] dict creation performance regression

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I confirm that.

$ ./python -m timeit -n 1000000 '{};{};{};{};{};{};{};{};{};{}'

2.6: 0.62 usec
2.7: 0.57 usec
3.1: 0.55 usec
3.2: 0.48 usec
3.3: 1.5 usec

Randomization is not affecting it.

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keywords: +3.3regression
nosy: +serhiy.storchaka

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<http://bugs.python.org/issue16465>
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