2.7 sec in total
271 ms
2.2 sec
173 ms
Visit stelling-amsterdam.org now to see the best up-to-date Stelling Amsterdam content and also check out these interesting facts you probably never knew about stelling-amsterdam.org
Historische informatie over de Stelling van Amsterdam, een waterlinie met forten en waterwerken als Nationaal Reduit rond Amsterdam, door particuliere experts.
Visit stelling-amsterdam.orgWe analyzed Stelling-amsterdam.org page load time and found that the first response time was 271 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
stelling-amsterdam.org performance score
name
value
score
weighting
Value2.1 s
82/100
10%
Value4.4 s
39/100
25%
Value3.3 s
91/100
10%
Value0 ms
100/100
30%
Value0
100/100
15%
Value2.1 s
99/100
10%
271 ms
708 ms
306 ms
235 ms
230 ms
Our browser made a total of 38 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Stelling-amsterdam.org, 87% (33 requests) were made to Stelling-amsterdam.nl and 5% (2 requests) were made to . The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source Stelling-amsterdam.nl.
Page size can be reduced by 70.9 kB (7%)
1.0 MB
960.9 kB
In fact, the total size of Stelling-amsterdam.org main page is 1.0 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 923.7 kB which makes up the majority of the site volume.
Potential reduce by 34.7 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 34.7 kB or 41% of the original size.
Potential reduce by 17.0 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Stelling Amsterdam images are well optimized though.
Potential reduce by 8.4 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 8.4 kB or 78% of the original size.
Potential reduce by 10.8 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Stelling-amsterdam.org needs all CSS files to be minified and compressed as it can save up to 10.8 kB or 79% of the original size.
We found no issues to fix!
33
33
The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Stelling Amsterdam. According to our analytics all requests are already optimized.
stelling-amsterdam.org
271 ms
www.stelling-amsterdam.nl
708 ms
algemeen.css
306 ms
algemeen.js
235 ms
freefind.css
230 ms
freefind.js
307 ms
flattr-badge-large.png
19 ms
Z
17 ms
nieuwjaar.nl.jpg
684 ms
navfoto-background.png
113 ms
rss.png
104 ms
twitter.png
102 ms
facebook.png
164 ms
linkedin.png
206 ms
instagram.png
203 ms
flickr.png
205 ms
panoramio.png
212 ms
youtube.png
261 ms
layar.png
303 ms
titel.nl.gif
402 ms
unesco.png
500 ms
item-gesloten.gif
301 ms
hoofd.jpg
538 ms
hoofd.jpg
792 ms
hoofd.jpg
951 ms
hoofd.jpg
784 ms
hoofd.jpg
885 ms
hoofd.jpg
840 ms
hoofd.jpg
873 ms
hoofd.jpg
991 ms
hoofd.jpg
1111 ms
hoofd.jpg
1036 ms
hoofd.jpg
1075 ms
hoofd.jpg
1090 ms
hoofd.jpg
1157 ms
keel.gif
1288 ms
flattr-badge-large.png
9 ms
Z
2 ms
stelling-amsterdam.org accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
stelling-amsterdam.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
stelling-amsterdam.org SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
robots.txt is not valid
NL
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Stelling-amsterdam.org can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it does not match the claimed English language. Our system also found out that Stelling-amsterdam.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
stelling-amsterdam.org
Open Graph description is not detected on the main page of Stelling Amsterdam. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: