Simon Helsen created JENA-256:
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Summary: Significant performance regression (TDB?) on 2.7.1 RC
compared to May 15 build
Key: JENA-256
URL: https://issues.apache.org/jira/browse/JENA-256
Project: Apache Jena
Issue Type: Bug
Components: TDB
Affects Versions: Jena 2.7.1
Environment: Windows 7, 64 bit, tested against 2.7.1 RC from June 9
versus a build from May 15
Reporter: Simon Helsen
Priority: Critical
See also
http://mail-archives.apache.org/mod_mbox/jena-dev/201206.mbox/%3C4FD9F19E.3080904%40bristol.ac.uk%3E
I was able to reproduce the performance regression with an isolated test
scenario. So I recreated the components ARQ, CORE, IRI, and TDB with the SVN
state of May 15 9 (so svn update -r {2012-05-15} and then svn clean install)
I then created a simple test program (attached as
PerformanceRegressionTest.java) which I ran 4 times in a row for each version
of Jena. Note that I deleted the TDB directory after the first 4 runs before
using the other Jena version. Attached are the files with the output. The
regression is obvious
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