Hi, shouldn’t we have the same level of performance with Fuseki and with a simple servlet that calls ARQ?
I hadn’t try fuseki until now. Yesterday, I downloaded the 2.3.0 release, started the server in a terminal window of my mac (osx 10.10.5) with: ./fuseki-server --mem /ds I uploaded a rdf file (skos-like data, 21K triples), and I began to make some queries. I’m used to play with that data in jena memory models, and to query it. Getting results in Fuseki GUI seemed slow to me, I decided to compare with a simple servlet that loads a memory model with the same data on init, and calls ARQ in its doGet method. I loaded both fuseki and my simple servlet in an instance of tomcat 8, both loaded with the same data (default graph, memory model), and I measured the time for some GET queries as seen by a client I wrote using jersey. Here are the results. For each sparql query, times with the simple servlet, and with fuseki: the time for the first call, and the mean when calling it 10 times (with the simple servlet, it is generally much faster after the first call, but this is not related to HTTP caching: I took attention to it, and I verified, in the case of the simple servlet, that its doGet method gets actually called) Depending on the query, differences are small, or huge. PREFIX tag: <http://127.0.0.1:8080/fuseki/ds/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> SELECT ?tag WHERE { ?tag skos:broader tag:semantic_web. } SIMPLE FIST CALL: 0.039 SIMPLE MEAN: 0.0213 FUSEKI FIST CALL: 0.025 FUSEKI MEAN: 0.0215 PREFIX tag: <http://127.0.0.1:8080/fuseki/ds/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> DESCRIBE ?tag WHERE { ?tag skos:broader tag:afrique. } SIMPLE FIST CALL: 0.039 SIMPLE MEAN: 0.0216 FUSEKI FIST CALL: 0.485 FUSEKI MEAN: 0.2284 PREFIX tag: <http://127.0.0.1:8080/fuseki/ds/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> SELECT ?tag WHERE { ?tag skos:broader* tag:science. } SIMPLE FIST CALL: 0.172 SIMPLE MEAN: 0.0225 FUSEKI FIST CALL: 3.981 FUSEKI MEAN: 3.1274 PREFIX tag: <http://127.0.0.1:8080/fuseki/ds/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> DESCRIBE ?tag WHERE { ?tag skos:broader* tag:linked_data. } SIMPLE FIST CALL: 0.131 SIMPLE MEAN: 0.0417 FUSEKI FIST CALL: 1.46 FUSEKI MEAN: 1.3244 PREFIX tag: <http://127.0.0.1:8080/fuseki/ds/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> SELECT ?tag WHERE { ?tag a <http://www.semanlink.net/2001/00/semanlink-schema#Tag>. } LIMIT 1000 SIMPLE FIST CALL: 0.07 SIMPLE MEAN: 0.0269 FUSEKI FIST CALL: 0.037 FUSEKI MEAN: 0.024399999999999998 PREFIX tag: <http://127.0.0.1:8080/fuseki/ds/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> DESCRIBE ?tag WHERE { ?tag a <http://www.semanlink.net/2001/00/semanlink-schema#Tag>. } LIMIT 1000 SIMPLE FIST CALL: 0.181 SIMPLE MEAN: 0.13440000000000002 FUSEKI FIST CALL: 6.471 FUSEKI MEAN: 5.497999999999999 Do you have an explanation? Best Regards, fps
