On Tue, 1 Apr 2008, Dirk Rothe wrote:
Ok, but by inspecting the java code, this was pretty trivial to implement
in Python. Only curiosity, but do you think the java version would be
(significantly) faster. I'm not sure I understand the performance
implications from the jcc bridge.
I don't know. How about measuring it ?
The jcc bridge involves converting some literals from java to python (such
as strings), releasing the GIL (global interpreter lock) when leaving
python and reacquiring it when returnig.
The jcc bridge also keeps track of the java objects returned to python so
that they don't get garbage collected until python no longer uses them.
This is implemented via a C++ multimap.
It's been shown before that using a python HitCollector (used in a very
tight loop by the Lucene core) is significantly slower than using the java
equivalent [1].
Ok, I will try to measure it.
After I understand the makefile jar/java stuff better - and I guess thats
after my theoretical CS Exams next Week ;).
To add a JAR file to the PyLucene build, look at line 171 in the Makefile
for the current list of JAR files. Looking above that line should show you
how to add another JAR file.
Andi..
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