[Python-Dev] Timing breakdown of Py_InitializeEx_Private()

[Brett Cannon]

On Tue, Apr 15, 2014 at 5:40 PM, Guido van Rossum <guido at python.org> wrote:

> Are you going to post your code (or a link to it)?
>

I basically wrote a function that uses gettimeofday() and just calculates
the delta between the calls. Greg Smith verified that I wasn't doing
anything stupid. =) Anyway, the diff can be found at
https://gist.github.com/brettcannon/9cd3960dd067bb7a45bd .

-Brett


>
>
> On Tue, Apr 15, 2014 at 2:26 PM, Brett Cannon <bcannon at gmail.com> wrote:
>
>> To finish my timing work I decided to see where Py_InitializeEx_Private()
>> spends its time. The following is a breakdown measured in microseconds
>> running using -E:
>>
>> INIT:
>> setlocale: 11
>> envvar: 2
>> random init: 2
>> interp creation: 15
>> thread creation: 6
>> GIL: 10
>> _Py_ReadyTypes(): 930
>> more types: 44
>> builtins: 141
>> exceptions: 287
>> sys: 258
>> _PyImport_Init: 15
>> import hooks: 4
>> _PyWarnings_Init(): 15
>> ENTERING import_init():
>>   PyImport_ImportFrozenModule(_frozen_importlib): 1186
>>   interp->importlib: 6
>>   PyInit_imp(): 15
>>   _imp: 3
>>   importlib._install(): 876
>>   _PyImportZip_Init(): 130
>> _PyFaulthandler_Init(): 13
>> time: 3
>> ENTERING initfsencoding():
>>   codec lookup: 2179
>> signals: 120
>> tracemalloc: 7
>> __main__: 13
>> initstdio(): 1568
>> warnings module: 4
>> initsite(): 9552
>>
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>
>
> --
> --Guido van Rossum (python.org/~guido)
>
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