[New-bugs-announce] [issue16465] dict creation performance regression

[Philipp Hagemeister]

New submission from Philipp Hagemeister:

On my system, {}  has become significantly slower in 3.3:

$ python3.2 -m timeit -n 1000000 '{}'
1000000 loops, best of 3: 0.0314 usec per loop
$ python3.3 -m timeit -n 1000000 '{}'
1000000 loops, best of 3: 0.0892 usec per loop
$ hg id -i
ee7b713fec71+
$ ./python -m timeit -n 1000000 '{}'
1000000 loops, best of 3: 0.0976 usec per loop

Is this because of the dict randomization?

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components: Interpreter Core
messages: 175503
nosy: phihag
priority: normal
severity: normal
status: open
title: dict creation performance regression
type: performance
versions: Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16465>
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