On 10/8/2014 4:35 PM, Florian Bruhin wrote: > * Joel B. Mohler <jmoh...@gamry.com> [2014-10-08 13:32:37 -0400]: >> I just found an annoying bit in PySide.__init__ while examining >> application start-up time. > Sorry for the (slight) offtopic, but how do you measure this? All the > profilers I've checked so far don't profile what happens inside Qt and > the mainloop when Python isn't involved. I'd be glad if there is some > way to do this :)
Right, I'm using the standard python profiler and it won't measure inside C function calls. However, in this case that was enough to highlight this specific code in PySide. I actually use IPython and type "%prun import PySide". I show the output in the PS (because IPython is extremely handy and worth illustrating!). >> On my windows 7 32 bit machine, the call to >> QtNetwork.QSslSocket.supportsSsl() takes almost exactly 1 second. > With my PyQt applications, I *sometimes* have a similiar delay when > initializing the QNetworkAccessManager the first time. Maybe this is > the same issue? It might be the same thing in a different form. Whether or not "supportsSsl" is legitimately taking 1 second, I don't really know (or care). The reason I don't care is because I don't want to call it at all, but PySide has coded it directly in the root PySide.__init__: https://qt.gitorious.org/pyside/pyside/source/0c64d1b2c6e5e0951675ad9b22294db4a10741c7:PySide/__init__.py.in#L37 Joel PS: C:\> ipython Python 2.7.6 (default, Nov 10 2013, 19:24:18) [MSC v.1500 32 bit (Intel)] Type "copyright", "credits" or "license" for more information. IPython 2.2.0 -- An enhanced Interactive Python. ? -> Introduction and overview of IPython's features. %quickref -> Quick reference. help -> Python's own help system. object? -> Details about 'object', use 'object??' for extra details. In [1]: %prun import PySide 1476 function calls (1473 primitive calls) in 0.975 seconds Ordered by: internal time ncalls tottime percall cumtime percall filename:lineno(function) 1 0.941 0.941 0.941 0.941 {supportsSsl} 1 0.018 0.018 0.018 0.018 _utils.py:91(get_pyside_dir) 1 0.007 0.007 0.975 0.975 <string>:1(<module>) 1 0.005 0.005 0.968 0.968 __init__.py:6(_setupQtDirectories) 21 0.001 0.000 0.001 0.000 {nt._isdir} ..... _______________________________________________ PySide mailing list PySide@qt-project.org http://lists.qt-project.org/mailman/listinfo/pyside
