25.04.18 10:57, Ivan Levkivskyi пише:
On 25 April 2018 at 06:03, INADA Naoki
<songofaca...@gmail.com
<mailto:songofaca...@gmail.com>> wrote:
enum class&member creation cost is much heavier than "import enum" cost.
Especially, "import socket, ssl" is much slower than before...
Is it slow simply because we are creating new class objects or
EnumMeta.__new__ does
some extensive calculations? In the latter case rewriting EnumMeta in C
might help.
Creating a new function is very cheap -- just around 50 ns on my computer.
Creating a new class is over two orders costly -- around 7 us for an
empty class on my computer.
Creating a new Enum class is much more costly -- around 40 us for an
empty class (or 50 us for IntEnum) plus 7 us per member.
Creating a new namedtuple type has the same cost as creating Enum class.
It was much costly before 3.7.
Thus creating a typical Enum class with 3-5 members is like creating 10
normal classes. Not much modules have 10 classes.
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