On 12/22/19 4:17 PM, Kingsley Idehen wrote: > On 12/22/19 3:17 PM, Amirouche Boubekki wrote: >> Hello all ;-) >> >> >> I ported the code to Chez Scheme to do an apple-to-apple comparison >> between GNU Guile and Chez and took the time to launch a few queries >> against Virtuoso available in Ubuntu 18.04 (LTS). >> >> Spoiler: the new code is always faster. >> >> The hard disk is SATA, and the CPU is dubbed: Intel(R) Xeon(R) CPU >> E3-1220 V2 @ 3.10GHz >> >> I imported latest-lexeme.nt (6GB) using guile-nomunofu, chez-nomunofu >> and Virtuoso: >> >> - Chez takes 40 minutes to import 6GB >> - Chez is 3 to 5 times faster than Guile >> - Chez is 11% faster than Virtuoso >> >> Regarding query time, Chez is still faster than Virtuoso with or >> without cache. The query I am testing is the following: >> >> SELECT ?s ?p ?o >> FROM <http://fu> >> WHERE { >> ?s <http://purl.org/dc/terms/language> >> <http://www.wikidata.org/entity/Q150> . >> ?s <http://wikiba.se/ontology#lexicalCategory> >> <http://www.wikidata.org/entity/Q1084> . >> ?s <http://www.w3.org/2000/01/rdf-schema#label> ?o >> }; >> >> Virtuoso first query takes: 1295 msec. >> The second query takes: 331 msec. >> Then it stabilize around: 200 msec. >> >> chez nomunofu takes around 200ms without cache. >> >> There is still an optimization I can do to speed up nomunofu a little. >> >> >> Happy hacking! > If you are going to make claims about Virtuoso, please shed light on > your Virtuoso configuration and host machine. > > How much memory do you have on this machine? What the CPU Affinity re > CPUs available. > > Is there a URL for sample data used in your tests?
Looking at https://ark.intel.com/content/www/us/en/ark/products/65734/intel-xeon-processor-e3-1220-v2-8m-cache-3-10-ghz.html, your Virtuoso INI settings are even more important due to the fact that we have CPU Affinity of 4 in play i.e., you need configure Virtuoso such that it optimizes behavior for this setup. -- Regards, Kingsley Idehen Founder & CEO OpenLink Software Home Page: http://www.openlinksw.com Community Support: https://community.openlinksw.com Weblogs (Blogs): Company Blog: https://medium.com/openlink-software-blog Virtuoso Blog: https://medium.com/virtuoso-blog Data Access Drivers Blog: https://medium.com/openlink-odbc-jdbc-ado-net-data-access-drivers Personal Weblogs (Blogs): Medium Blog: https://medium.com/@kidehen Legacy Blogs: http://www.openlinksw.com/blog/~kidehen/ http://kidehen.blogspot.com Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about LinkedIn: http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal: http://kingsley.idehen.net/public_home/kidehen/profile.ttl#i : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this
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