On 21/11/15 01:28, François-Paul Servant wrote:
Hi,
it seems to me that JSON-LD serialization is slow. Do you have the same feeling?
Here are the results of a comparative test that I run on my machine (outputing
one model to a file, using Jena 3.0.1-SNAPSHOT)
Are these single run costs? i.e. from cold?
model.size() 7559
JSON-LD TIME: 649 ms
Jena use a separate self-contained engine, jsonld-java, which in trun
uses Jackson.
It means taking a copy of much of the material to be printed, getting an
in-memory structure then traversing it for output, including formatting
the JSON so it is not all on one line and JSON-indented.
TURTLE TIME: 136 ms
That is the normal Turtle writer? It's pretty printing and so
non-streaming - there are variations (RDFFormat) to printing streaming
style with less prettiness but still using prefixed names. Pretty is
not free.
RDF/XML TIME: 548 ms
Ditto - RDF/XML or RDF/XML-ABBREV. The default using RDFDataMgr for
Loang.RDFXML is "pretty" (RDF/XML-ABBREV)
N-TRIPLE TIME: 61 ms
Is that to a spinning disk or SSD? (Given a disk write inc sync is of
the order of 10ms)
Andy
annoying...
Best,
fps
