On 14/03/18 19:12, Élie Roux wrote:
In the case of inference then yes there is also an upfront cost of
computing the inferences. Once computed these are typically cached
(though this depends on the rule set) and any changes to the data
might invalidate that cache. You can call prepare() on the InfModel
to incur the initial computation cost separately, otherwise the
initial computation cost is incurred by whatever operation first
accesses the InfModel. And as your email shows subsequent calls don't
incur that cost and are much faster.
I don't disagree, but I think there's a problem of scale here: even with
a cold JVM and a not-too-efficient reasoner, it seems totally
unreasonable that a reasoner would take 60 full seconds (that's what
Marc's test is taking on my machine) to run inference on a very small
dataset already loaded in memory... 60s for such a small operation
really seems to indicate a bug to me. But maybe it doesn't...
What's owlURL?
The second time cost is does not incur the forward inference rules, 9ms.
(Actually, if you see 60s and Marc sees 18s, something else is going on
as well)
Thank you,
