On 25 April 2018 at 11:03, Serhiy Storchaka <storch...@gmail.com> wrote:
> 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. > > Hm, this is what I wanted to know. I think by rewriting EnumMeta in C we can reduce the creation time of an Enum class (almost) down to the creation time of a normal class, which may be a 4-5x speed-up. What do you think? -- Ivan
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