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https://issues.apache.org/jira/browse/JENA-1562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16507493#comment-16507493
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ASF GitHub Bot commented on JENA-1562:
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GitHub user afs opened a pull request:
https://github.com/apache/jena/pull/434
JENA-1562: Fix for Graph.size() for TDB2 graphs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/afs/jena tdb2-graph-size
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/jena/pull/434.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #434
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commit de34b1cd77333faf5b84765e626a065d313aec90
Author: Andy Seaborne <andy@...>
Date: 2018-06-10T08:52:18Z
JENA-1562: Fix for Graph.size() for TDB2 graphs
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> TDB2 Graph.size() is much slower than TDB1.
> -------------------------------------------
>
> Key: JENA-1562
> URL: https://issues.apache.org/jira/browse/JENA-1562
> Project: Apache Jena
> Issue Type: Bug
> Affects Versions: Jena 3.7.0
> Reporter: Andy Seaborne
> Assignee: Andy Seaborne
> Priority: Major
> Fix For: Jena 3.8.0
>
>
> TDB2 {{Graph.size()}} is much slower than TDB1.
> TDB2 {{Graph.size()}} relies on {{GraphBase.size}}, which uses
> {{graph.find(ANY,ANY,ANY)}} which creates nodes and triples unnecessarily for
> the count.
> TDB1 has code to use the primary tupleindex size() operation and it 50x
> faster on 5m triples in the default graph.
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