SimonBin opened a new issue, #1635:
URL: https://github.com/apache/jena/issues/1635
### Version
4.7.0-SNAPSHOT
### Question
In some queries like graph ?g {}, it is desirable to get a list of all named
graphs currently in a dataset. However, this is exceptionally slow for huge
datasets with billions of quads, as Jena has to run quads.findAll().distinct(),
or even for some query types where ?g is unbound.
I wonder if it could be sped up somehow by making use of a G??? index, by
bisecting to the right node after the end of each Graph and thus avoiding
having to iterate through all quads?
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