3.3 sec in total
274 ms
2.7 sec
391 ms
Visit online-learning.tudelft.nl now to see the best up-to-date Online Learning TU Delft content for Netherlands and also check out these interesting facts you probably never knew about online-learning.tudelft.nl
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Visit online-learning.tudelft.nlWe analyzed Online-learning.tudelft.nl page load time and found that the first response time was 274 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
online-learning.tudelft.nl performance score
name
value
score
weighting
Value2.5 s
69/100
10%
Value4.6 s
35/100
25%
Value5.3 s
58/100
10%
Value4,070 ms
1/100
30%
Value0.135
80/100
15%
Value11.2 s
20/100
10%
274 ms
997 ms
259 ms
589 ms
495 ms
Our browser made a total of 50 requests to load all elements on the main page. We found that 16% of them (8 requests) were addressed to the original Online-learning.tudelft.nl, 30% (15 requests) were made to Media.tudelft.nl and 8% (4 requests) were made to D.adroll.com. The less responsive or slowest element that took the longest time to load (997 ms) belongs to the original domain Online-learning.tudelft.nl.
Page size can be reduced by 402.2 kB (19%)
2.1 MB
1.7 MB
In fact, the total size of Online-learning.tudelft.nl main page is 2.1 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. 35% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.
Potential reduce by 58.1 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. This page needs HTML code to be minified as it can gain 12.0 kB, which is 17% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 58.1 kB or 83% of the original size.
Potential reduce by 105.0 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. Online Learning TU Delft images are well optimized though.
Potential reduce by 154.1 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 154.1 kB or 63% of the original size.
Potential reduce by 85.0 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. Online-learning.tudelft.nl needs all CSS files to be minified and compressed as it can save up to 85.0 kB or 85% of the original size.
Number of requests can be reduced by 18 (46%)
39
21
The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Online Learning TU Delft. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.
online-learning.tudelft.nl
274 ms
online-learning.tudelft.nl
997 ms
style.css
259 ms
script.js
589 ms
maintanance-website.png
495 ms
selftestcheck.jpg
502 ms
gtm.js
99 ms
icons.woff
103 ms
OpenSans-Regular-webfont.woff
191 ms
OpenSans-Bold-webfont.woff
285 ms
marijn-janssen.jpg
640 ms
140-340px_-_fokko_van_de_bult_3.jpg
652 ms
140-340px_-_isabel_arends_2_voorkeur.jpg
723 ms
140-340px_-_herman_russchenberg_3.jpg
809 ms
erik-meijer.jpg
739 ms
140-340px_-_michel_van_eeten_4.jpg
748 ms
analytics.js
40 ms
roundtrip.js
59 ms
hotjar-101001.js
215 ms
collect
4 ms
collect
80 ms
2PGHD256DFFDBOHEHUA274.js
219 ms
ga-audiences
37 ms
modules-043c1e6abe660c48857202e419ff9d8a.js
25 ms
nuon_solar_team_-_2014_-_hans_peter_van_velthoven_-_home.jpg
744 ms
ewi_ex102x_teaser.gif
314 ms
tbm_ri101x_teaser.jpg
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citg_ctb3365st_teaser.jpg
667 ms
ewi_tw3421x_teaser.jpg
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659 ms
beta.png
113 ms
fbevents.hashing.js
134 ms
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40 ms
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39 ms
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49 ms
u.php
100 ms
adsct
121 ms
pixel
84 ms
56 ms
bounce
22 ms
sd
24 ms
377928.gif
13 ms
tap.php
35 ms
pixel
34 ms
5 ms
bounce
33 ms
Pug
46 ms
in
7 ms
visit-data
198 ms
online-learning.tudelft.nl accessibility score
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Buttons do not have an accessible name
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
online-learning.tudelft.nl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
online-learning.tudelft.nl SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Online-learning.tudelft.nl can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Online-learning.tudelft.nl 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.
online-learning.tudelft.nl
Open Graph data is detected on the main page of Online Learning TU Delft. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: