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williamrubens opened this issue Jul 12, 2018 · 8 comments
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Very Slow Python Initialize #703

williamrubens opened this issue Jul 12, 2018 · 8 comments

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@williamrubens
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Environment

Pythonnet version: 2.3.0
Python version: Python 3.5 (conda environment)
Operating System: Windows 10 64bit
VS 2017

Details

Hi guys, thanks for the great work building a super useful library. One question, and this could be expected behavior, I'm not sure. When I initialize the python interpreter on the .Net side, with this call:

using (Py.GIL()) {

I've timed it and it takes about 2 mins to complete the call. Further calls to grab python lock return immediately. I've also noticed that in visual studio my output window I see thousands of messages of this form:

Exception thrown at 0x00007FFE37F73C58 in RSUser.exe: Microsoft C++ exception: EEFileLoadException at memory location 0x000000314CBFB8F0.
Exception thrown at 0x00007FFE37F73C58 in RSUser.exe: Microsoft C++ exception: [rethrow] at memory location 0x0000000000000000.
Exception thrown at 0x00007FFE37F73C58 in RSUser.exe: Microsoft C++ exception: EEFileLoadException at memory location 0x000000314CBFB8F0.
Exception thrown: 'System.IO.FileNotFoundException' in mscorlib.dll
Exception thrown at 0x00007FFE37F73C58 in RSUser.exe: Microsoft C++ exception: EEFileLoadException at memory location 0x000000314CBFB8F0.
Exception thrown at 0x00007FFE37F73C58 in RSUser.exe: Microsoft C++ exception: [rethrow] at memory location 0x0000000000000000.
@filmor
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filmor commented Jul 23, 2018

I have never observed this, can you disclose your test sample?

@den-run-ai
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den-run-ai commented Jul 24, 2018 via email

@filmor filmor mentioned this issue Aug 9, 2018
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@williamrubens
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I switched to running under release and it's much faster, takes around 40 seconds now, though I can still thousands of exceptions in the output window. Sounds like it could be some VS settings... any ideas which ones to play with?

@inna-w
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inna-w commented Aug 21, 2018

This issue was discussed before: #598.
The solution proposed by @dmitriyse there worked for me - we are using build from featured branch. This also solved crashes on obfuscated types names in 3rd party assemblies.

@filmor filmor mentioned this issue Aug 21, 2018
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@williamrubens
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Switching to using the featured branch has solved the thousands of exceptions problem. It's also now quite speedy in release mode. It still takes forever in debug mode.

@den-run-ai
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@williamrubens PR #723 should add this feature once merged into master.

@den-run-ai
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closed by #723

@simonbuehler simonbuehler mentioned this issue Jan 28, 2020
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@simonbuehler
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I'm still having the very same issue with those exceptions beeing thrown and a very slow startup behaviour, is this normal or how can i debug this?

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@filmor @simonbuehler @den-run-ai @williamrubens @inna-w