Site Performance and Stats
In Detail

Website Performance – The Geeky Part

What, all that information was not enough? You want... more? Right, then. You asked for it.

swi-prolog.org In Detail

As we've mentioned before, traffic is not a key metric. However, the target audience does say a lot about what's been done to optimize the website, as well as what should be done going forwards. Let's see if we have any useful information here.

swi-prolog.org Visitor Information

Absolute accuracy is accessible only by the webmasters. If you keep that in mind, perhaps you will find out approximate numbers of some use.
Where appropriate, we'll add an insight, but the numbers themselves speak clearly enough, eh?

Website load speed analysis

• The homepage takes approximately 0.0864 seconds to load. Load speed (and overall responsiveness) is such an important factor for both search engines and user experience, would you not agree? With that in mind, this is a very good result.
• The HTML of the website weighs in at around 3.2 kilobytes. We don't think 3.2 KBs is something to worry about.

Alexa ranking in-depth

With over 4 million websites indexed (which can seem as a lot, or very little, depending on your point of view), Alexa is perhaps the oldest and certainly the best known ranking system, deservedly or not. The Alexa Global and Local ranks of a website are based on an approximate amount of visitors a given website receives. The more visitors, the higher the rank. The Alexa rank, be it Local or Global, should be taken with a pinch of salt. After all, visitor count is by far not the simple measure of a website's success it's made out to be. For example, a gardening website is never going to be as popular as a movie review website. It does not mean it's not popular within it's niche.

• swi-prolog.org takes up 126 901 place globally, according to Alexa. We made sure to update this information on 2018-01-18.
• Compare the current rank to all-time best of 66 423, which this website enjoyed on 2017-12-16.
• Over the last three months, the position has changed by -76658.
• On the other end of the scale, the worst rank ever was 675 377, rated on 2014-08-25. Compare that to the current rank to see a marked improvement, even if of debatable importance.
• Given all the numbers, the average Global rank is at 234 263.
• When compared to India websites, swi-prolog.org ranks in 41 433 place.

QUANTCAST rank overview

QUANTCAST - an advertising-related data processing company - mostly specializes in real-time audience analysis and measurements. In other words it, like Alexa, is basing its rankings on approximate traffic numbers. Currently, QUANTCAST has rated around 58 591 776 websites. Just like ALEXA, this is not a metric of huge importance, so don't base your SEO decisions on QUANTCAST rank, specifically. At best, it's a vague representation of how your website is doing in the grand scheme of things, but it does not take all that much context into account.

• Quantcast claims swi-prolog.org takes up 515 511 place at this time, among all the indexed websites. We last checked this data on 2014-01-15.
• This website achieved its best Quantcast rank of 515 301 on 2014-01-07.
• For comparison, the worst position was 531 233 on 2013-11-22.

Detailed Host Server Information

Similarly to how a hard drive or a modern SSD device holds your files, a server holds all the files the website needs to operate. To load a webpage, your browser needs to contact the said server and request files - strings of code that make up the website into what it is, including images, text and database entries. Each physical server has a unique IP address that is used by the browser to contact it.

• The website's server IP address is 23.235.40.249.
• The physical server is in the city of Amsterdam, North Holland, Netherlands. The zip code is 1000.
• Server appears to be online.

HTTP header and WHOIS information

Let's see what technical information we've managed to gather:

HTTP/1.1 301 Moved Permanently
Server: nginx/1.4.6 (Ubuntu)
Date: Sun, 15 May 2016 14:27:42 GMT
Content-Type: text/html
Content-Length: 193
Connection: keep-alive
Location: http://www.swi-prolog.org/

HTTP/1.1 200 OK
Server: nginx/1.4.6 (Ubuntu)
Content-Type: text/html; charset=UTF-8
Content-Encoding: gzip
Via: 1.1 varnish
Fastly-Debug-Digest: f86fd69e9745400ac114e6ca1789976836041793f1ec72d09cec7a82e0dab070
Content-Length: 3111
Accept-Ranges: bytes
Date: Sun, 15 May 2016 14:25:07 GMT
Via: 1.1 varnish
Age: 2384
Connection: keep-alive
X-Served-By: cache-sea1926-SEA, cache-ord1722-ORD
X-Cache: HIT, HIT
X-Cache-Hits: 3, 2
X-Timer: S1463322307.667522,VS0,VE0

Domain Name: SWI-PROLOG.ORG Domain ID: D81300005-LROR WHOIS Server: Referral URL: http://www.openprovider.com Updated Date: 2015-12-17T22:35:38Z Creation Date: 2001-12-17T19:28:14Z Registry Expiry Date: 2016-12-17T19:28:14Z Sponsoring Registrar: Hosting Concepts B.V. d/b/a Openprovider Sponsoring Registrar IANA ID: 1647 Domain Status: ok https://www.icann.org/epp#ok Registrant ID: AV903980-NL-8628 Registrant Name: Anja VanDerHulst Registrant Organization: Registrant Street: Lijnbaansgracht 53 hs Registrant City: Amsterdam Registrant State/Province: Registrant Postal Code: 1015GR Registrant Country: NL Registrant Phone: +31.31624786959 Registrant Phone Ext: Registrant Fax: Registrant Fax Ext: Registrant Email: [email protected] Admin ID: AV903980-NL-8628 Admin Name: Anja VanDerHulst Admin Organization: Admin Street: Lijnbaansgracht 53 hs Admin City: Amsterdam Admin State/Province: Admin Postal Code: 1015GR Admin Country: NL Admin Phone: +31.31624786959 Admin Phone Ext: Admin Fax: Admin Fax Ext: Admin Email: [email protected] Tech ID: AV903815-NL-3530 Tech Name: Atilla van der Velde Tech Organization: PCextreme B.V. Tech Street: Londensekaai 1 Tech City: Middelburg Tech State/Province: Zeeland Tech Postal Code: 4331JG Tech Country: NL Tech Phone: +31.207009910 Tech Phone Ext: Tech Fax: +31.207009911 Tech Fax Ext: Tech Email: [email protected] Name Server: V1.PCEXTREME.NL Name Server: V2.PCEXTREME.NL Name Server: V3.PCEXTREME.EU DNSSEC: signedDelegation >>> Last update of WHOIS database: 2016-05-13T13:50:28Z <<<
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