New submission from Ondřej Medek:

The logging.getLevelName contains code:

return _levelToName.get(level, _nameToLevel.get(level, ("Level %s" % level)))

I am still a Python beginner, but I think the most of the times the 
_nameToLevel.get is called unnecessarily. IMHO the code should be

return _levelToName.get(level, (_nameToLevel.get(level, ("Level %s" % level))))

or maybe better a classic if then style:
result = _levelToName.get(level)
if result is None:
   result = _nameToLevel.get(level, ("Level %s" % level))
return result

Since this function is called every time the LogRecord is created, I think it 
should be microoptimized.

----------
components: Library (Lib)
messages: 274210
nosy: Ondřej Medek
priority: normal
severity: normal
status: open
title: logging.getLevelName microoptimization
type: performance
versions: Python 3.5

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue27937>
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