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Re: [Wikidata] [ANN] nomunofu v0.1.0

From: Ted Thibodeau Jr
Subject: Re: [Wikidata] [ANN] nomunofu v0.1.0
Date: Sun, 22 Dec 2019 18:36:06 -0500

On Dec 22, 2019, at 03:17 PM, Amirouche Boubekki <address@hidden> 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).

Hi, Amirouche --

Kingsley's points about tuning Virtuoso to use available 
RAM [1] and other system resources are worth looking into, 
but a possibly more important first question is --

   Exactly what version of Virtuoso are you testing?

If you followed the common script on Ubuntu 18.04, i.e., --

   sudo apt update

   sudo apt install virtuoso-opensource

-- then you likely have version 6.1.6 of VOS, the Open Source 
Edition of Virtuoso, which shipped 2012-08-02 [2], and is far
behind the latest version of both VOS (v7.2.5+) and Enterprise 
Edition (v8.3+)!

The easiest way to confirm what you're running is to review 
the first "paragraph" of output from the command corresponding 
to the name of your Virtuoso binary --

   virtuoso-t -?

   virtuoso-iodbc-t -?

If I'm right, and you're running 6.x, you'll get much better
test results just by running a current version of Virtuoso.

You can build VOS 7.2.6+ from source [3] (we'd recommend the 
develop/7 branch [4] for the absolute latest), or download a 
precompiled binary [5] of VOS or

You can also try Enterprise Edition at no cost for 30 days [5].






> 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

How did you load the data?  Did you use Virtuoso's build-load
facilities?  This is the recommended method [6].


> 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>
>  ?s <> <> 
> .
>  ?s <>
> <> .
>  ?s <> ?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!

I'll be interested to hear your new results, with a current build,
and with proper INI tuning in place.



A: Yes.                
| Q: Are you sure?           
| | A: Because it reverses the logical flow of conversation.
| | | Q: Why is top posting frowned upon?

Ted Thibodeau, Jr.           //               voice +1-781-273-0900 x32
Senior Support & Evangelism  //        mailto:address@hidden
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