Message309679
On 08/01/2018 17:22, Michael wrote:
> On 08/01/2018 16:07, Michael Felt wrote:
>> Michael Felt <michael@felt.demon.nl> added the comment:
>>
>> Considering that _uuid is now working for AIX issue32399 -
some time differences - this is on POWER6 (10 years old system) - I
expect POWER8 and POWER9 to be much quicker in exact times.
michael@x071:[/data/prj/python/git/xlc-python3-3.7]./python
Python 3.7.0a3+ (heads/master:9b99747, Jan 8 2018, 15:50:03) [C] on aix6
Type "help", "copyright", "credits" or "license" for more information.
>>>
michael@x071:[/data/prj/python/git/xlc-python3-3.7]./python -m timeit -n
1000000 -r 5 'import uuid; getnode = uuid.getnode()'
1000000 loops, best of 5: 911 nsec per loop
michael@x071:[/data/prj/python/git/xlc-python3-3.7]python
Python 2.7.12 (default, Sep 29 2016, 12:02:17) [C] on aix5
Type "help", "copyright", "credits" or "license" for more information.
>>>
michael@x071:[/data/prj/python/git/xlc-python3-3.7]python -m timeit -n
1000000 -r 5 'import uuid; getnode = uuid.getnode()'
1000000 loops, best of 5: 2.86 usec per loop
michael@x071:[/data/prj/python/git/xlc-python3-3.7]
The second example is a) before the _uuid support was in the code, and
b) even if in the code would not have been built on AIX5.
The relative difference is: 911/2860 :: 31.85/100 - or roughly 3x faster
with _uuid.
As far as this issue is concerned - with _uuid active the buggy code I
mentioned for getnode() is defunct as it does not get called/parsed.
However, I shall continue with it.
Question: (must have questions!) - the behavior of getnode() without
_uuid is a 'random' value for getnode() with my current setup BUT using
the _uuid module it is a 'constant' that is related to (one of) the
network interface(s). What is the desired behavior, specifically, of
uuid.getnode() - constant, or 'random'?
>>
>> Does uuid.py (./Lib/uuid.py) call _uuid.py? |
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Date |
User |
Action |
Args |
2018-01-08 17:13:59 | Michael.Felt | set | recipients:
+ vstinner, serhiy.storchaka, David.Edelsohn |
2018-01-08 17:13:59 | Michael.Felt | link | issue28009 messages |
2018-01-08 17:13:59 | Michael.Felt | create | |
|