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https://issues.apache.org/jira/browse/JENA-1562?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne resolved JENA-1562.
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Resolution: Fixed
> 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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