2.3 sec in total
515 ms
1.7 sec
132 ms
Click here to check amazing Staff Leiden content for Netherlands. Otherwise, check out these important facts you probably never knew about staff.leiden.edu
Website for employees of Leiden University. Topics include terms of employment, allowances and IT services. You can also find announcements, news and manuals.
Visit staff.leiden.eduWe analyzed Staff.leiden.edu page load time and found that the first response time was 515 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.
staff.leiden.edu performance score
name
value
score
weighting
Value3.3 s
41/100
10%
Value8.1 s
2/100
25%
Value6.9 s
33/100
10%
Value120 ms
97/100
30%
Value0.002
100/100
15%
Value8.8 s
35/100
10%
515 ms
357 ms
469 ms
364 ms
186 ms
Our browser made a total of 24 requests to load all elements on the main page. We found that 17% of them (4 requests) were addressed to the original Staff.leiden.edu, 58% (14 requests) were made to Live.leiden.edu and 13% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (627 ms) relates to the external source Media.leidenuniv.nl.
Page size can be reduced by 34.2 kB (29%)
117.4 kB
83.2 kB
In fact, the total size of Staff.leiden.edu main page is 117.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 58.9 kB which makes up the majority of the site volume.
Potential reduce by 8.2 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 2.0 kB, which is 18% 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 8.2 kB or 72% of the original size.
Potential reduce by 2.0 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. Staff Leiden images are well optimized though.
Potential reduce by 34 B
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. This website has mostly compressed JavaScripts.
Potential reduce by 23.9 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. Staff.leiden.edu needs all CSS files to be minified and compressed as it can save up to 23.9 kB or 80% of the original size.
Number of requests can be reduced by 10 (53%)
19
9
The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Staff Leiden. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
staff.leiden.edu
515 ms
nbl.min.js
357 ms
main.css
469 ms
jquery-1.8.3.min.js
364 ms
rendition.js
186 ms
ga.js
7 ms
ul_logo.png
87 ms
bnbig_default.jpg
627 ms
ul_logo_print.png
169 ms
file_rss.png
181 ms
crumb_chevron.png
99 ms
bkg_main.png
150 ms
bkg_btn.png
173 ms
bkg_middle.png
180 ms
arrow_right.png
190 ms
arrow_midsec.png
195 ms
arrow_sidebar.png
256 ms
crumb_overlay.png
256 ms
plugins.js
98 ms
print.css
99 ms
4
183 ms
4
259 ms
__utm.gif
14 ms
__utm.gif
13 ms
staff.leiden.edu 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.
staff.leiden.edu best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
staff.leiden.edu SEO score
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 Staff.leiden.edu 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 Staff.leiden.edu 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.
staff.leiden.edu
Open Graph description is not detected on the main page of Staff Leiden. 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: