Uploaded image for project: 'Apache Jena'
  1. Apache Jena
  2. JENA-1414

Performance regression in Model.remove(Model m) method

    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • Jena 3.3.0, Jena 3.4.0
    • Jena 3.6.0
    • Core
    • None

    Description

      The Model.remove(Model) works very slow on large models, as it propagates to GraphUtil.deleteFrom(Graph, Graph), which computes size of the target graph by iterating over all triples. This computation takes nearly 100% of the time of the Model.remove(Model) operation.

      It seems this commit introduced the issue: https://github.com/apache/jena/commit/781895ce64e062c7f2268a78189a777c39b92844#diff-fbb4d11dc804464f94c27e33e11b18e8

      Due to this bug deletion of a concept scheme on a large ontology may take several minutes.

      Attachments

        1. graph_util_improve.patch
          4 kB
          Michał Woźniak

        Issue Links

          relates to

          Improvement - An improvement or enhancement to an existing feature or task. JENA-1284 Improve GraphUtil operations by considering relative graph sizes.

          • Major - Major loss of function.
          • Closed
          links to

          Web Link GitHub Pull Request #306

          Activity

            People

              andy Andy Seaborne
              misias Michał Woźniak
              Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: