#jython IRC Log

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IRC Log for 2015-09-24

Timestamps are in GMT/BST.

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[14:23] <sanbor> hello there
[14:24] <sanbor> we recently added Jython to our project and it added like 3 seconds of startup time
[14:25] <sanbor> we did some profiling and looks like it's waiting in some condition
[14:26] <sanbor> is there some reason of why the interpreter is it doing so much work on startup?
[14:26] <sanbor> looks like it's parsing Python source code
[14:27] <sanbor> I was hoping that what they would do is just load the .class file inside the .jar
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[16:29] <sanbor> if I remove the .py files from the Jython jar, it doesn't even bother to load the .class files, it want's the .py
[16:29] <sanbor> why there are .class files in the jar if only cares about the .py?
[16:31] <xemdetia> sanbor, you should share how you are invoking jython
[16:31] <xemdetia> I don't think the usual helpful people really can understand how you are building it
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[16:33] <sanbor> I'm adding the jython-standalone-2.7.0.jar jar to the classpath
[16:33] <sanbor> then instantiating the jython interpreter
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[16:34] <xemdetia> and when is the delay happening? is it happening before you activate the jython interpreter?
[16:34] <sanbor> the way they explain here http://www.jython.org/jythonbook/en/1.0/JythonAndJavaIntegration.html
[16:35] <sanbor> it is happening during the activation of the python interpreter
[16:36] <sanbor> during the execution of PythonInterpreter interp = new PythonInterpreter();
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[16:42] <sanbor> and an stack trace shows that Jython is parsing a bunch of py files, when it should use the .class in the jar
[16:42] <sanbor> it already has compiled versions of that .py files
[16:43] <xemdetia> well I don't think that's how it works
[16:44] <xemdetia> brb
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[18:35] <xemdetia> sanbor, you might want to experiment with -Dpython.import.site=false
[18:35] <xemdetia> that seems to improve the behaviour
[18:35] <xemdetia> a import sys print('hello') sys.exit(0)
[18:36] <xemdetia> with -S (equivalent option passed through python) real 0m2.015s without -S real 0m4.191s
[18:37] <xemdetia> this prevents jython from trying to scan the host for other installed python packages that could be configured
[18:46] <xemdetia> or at least
[18:46] <xemdetia> better behaviour to what you are trying to do
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