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Posted to dev@jena.apache.org by "Damien Obrist (Jira)" <ji...@apache.org> on 2019/10/16 11:47:00 UTC

[jira] [Created] (JENA-1769) Dataset#listNames slow for large TDB2 datasets

Damien Obrist created JENA-1769:
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             Summary: Dataset#listNames slow for large TDB2 datasets
                 Key: JENA-1769
                 URL: https://issues.apache.org/jira/browse/JENA-1769
             Project: Apache Jena
          Issue Type: Bug
          Components: TDB2
    Affects Versions: Jena 3.13.0
            Reporter: Damien Obrist


With Jena 3.13.0, the running time of {{Dataset#listNames}} has increased significantly for TDB2 datasets.

I have compared the running times for a sample TDB2 dataset containing *1'000'000 triples*. I have observed a running time of *~270ms* with Jena 3.12.0 and *~13.5s* with Jena 3.13.0.

We're using a dataset with many millions of triples and for our use case, the running time has increased from seconds to minutes.



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