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[Python-Dev] PEP 471 -- os.scandir() function -- a better and faster directory iterator

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On 27.06.2014 00:59, Ben Hoyt wrote:> Specifics of proposal> =====================> [snip] Each ``DirEntry`` object has the following> attributes and methods:> [snip]> Notes on caching> ---------------->> The ``DirEntry`` objects are relatively dumb -- the ``name`` attribute> is obviously always cached, and the ``is_X`` and ``lstat`` methods> cache their values (immediately on Windows via ``FindNextFile``, and> on first use on Linux / OS X via a ``stat`` call) and never refetch> from the system.I find this behaviour a bit misleading: using methods and have themreturn cached results. How much (implementation and/or performanceand/or memory) overhead would incur by using property-like access here?I think this would underline the static nature of the data.This would break the semantics with respect to pathlib, but they’re onlymarginally equal anyways -- and as far as I understand it, pathlib won’tcache, so I think this has a fair point here.regards,jwi

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