On 25 April 2018 at 06:03, INADA Naoki <songofaca...@gmail.com> wrote:
> On Wed, Apr 25, 2018 at 12:04 PM, Nick Coghlan <ncogh...@gmail.com> wrote: > > On 25 April 2018 at 04:56, Ethan Furman <et...@stoneleaf.us> wrote: > >> On 04/24/2018 10:32 AM, Antoine Pitrou wrote: > >> > >>> Also beware the import time cost of having a widely-used module like > >>> "warnings" depend on the "enum" module and its own dependencies. > >> > >> > >> With all the recent changes to Python, I should go through and see which > >> dependencies are no longer needed. > > > > I was checking this with "./python -X importtime -c 'import enum'", > > and the overall import time was around 9 ms with a cold disk cache, > > and 2 ms with a warm one. In both cases, importing "types" and > > "_collections" accounted for around a 3rd of the time, with the bulk > > of the execution time being enum's own module level code. > > > > 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. -- Ivan
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