Tools & Wizards About Us
studiegids.tudelft.nl screenshot

Report Summary

  • 92

    Performance

    Renders faster than
    92% of other websites

  • 49

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

studiegids.tudelft.nl

Course browser searcher

Page Load Speed

1.4 sec in total

First Response

293 ms

Resources Loaded

950 ms

Page Rendered

128 ms

studiegids.tudelft.nl screenshot

About Website

Welcome to studiegids.tudelft.nl homepage info - get ready to check Studiegids Tudelft best content for Netherlands right away, or after learning these important things about studiegids.tudelft.nl

Visit studiegids.tudelft.nl

Key Findings

We analyzed Studiegids.tudelft.nl page load time and found that the first response time was 293 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

studiegids.tudelft.nl performance score

92

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

88/100

10%

LCP (Largest Contentful Paint)

Value3.2 s

73/100

25%

SI (Speed Index)

Value2.7 s

96/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value1.8 s

100/100

10%

Network Requests Diagram

studiegids.tudelft.nl

293 ms

styles_0.css

92 ms

displaytag.css

182 ms

public.css

184 ms

submit.js

184 ms

Our browser made a total of 16 requests to load all elements on the main page. We found that 81% of them (13 requests) were addressed to the original Studiegids.tudelft.nl, 13% (2 requests) were made to Google-analytics.com and 6% (1 request) were made to Huisstijl.tudelft.nl. The less responsive or slowest element that took the longest time to load (369 ms) relates to the external source Huisstijl.tudelft.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 33.1 kB (26%)

Content Size

125.0 kB

After Optimization

91.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Studiegids.tudelft.nl main page is 125.0 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. Only 10% of websites need less resources to load. Images take 77.4 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 10.0 kB

  • Original 13.2 kB
  • After minification 11.4 kB
  • After compression 3.3 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 1.9 kB, which is 14% 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 10.0 kB or 75% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 77.4 kB
  • After minification 77.4 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. Studiegids Tudelft images are well optimized though.

JavaScript Optimization

-48%

Potential reduce by 6.9 kB

  • Original 14.2 kB
  • After minification 11.7 kB
  • After compression 7.3 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 6.9 kB or 48% of the original size.

CSS Optimization

-81%

Potential reduce by 16.3 kB

  • Original 20.2 kB
  • After minification 12.8 kB
  • After compression 3.9 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. Studiegids.tudelft.nl needs all CSS files to be minified and compressed as it can save up to 16.3 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (29%)

Requests Now

14

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Studiegids Tudelft. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

studiegids.tudelft.nl

studiegids.tudelft.nl

293 ms

styles_0.css

styles_0.css

92 ms

displaytag.css

displaytag.css

182 ms

public.css

public.css

184 ms

submit.js

submit.js

184 ms

action.js

action.js

182 ms

urchin.js

urchin.js

18 ms

menu.css

menu.css

182 ms

__utm.gif

__utm.gif

17 ms

free_logo_0.gif

free_logo_0.gif

369 ms

icon_print.gif;jsessionid=846B1A82661121F7FBAF07F44325CA0F

icon_print.gif;jsessionid=846B1A82661121F7FBAF07F44325CA0F

95 ms

taMenuBorder.gif

taMenuBorder.gif

97 ms

taMenuRight.gif

taMenuRight.gif

92 ms

taMenuLeft.gif

taMenuLeft.gif

96 ms

Studyguide.jpg;jsessionid=846B1A82661121F7FBAF07F44325CA0F

Studyguide.jpg;jsessionid=846B1A82661121F7FBAF07F44325CA0F

361 ms

styles_print.css

styles_print.css

92 ms

Accessibility Review

studiegids.tudelft.nl accessibility score

49

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

studiegids.tudelft.nl best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

studiegids.tudelft.nl SEO score

54

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Studiegids.tudelft.nl can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Studiegids.tudelft.nl main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

studiegids.tudelft.nl

Open Graph description is not detected on the main page of Studiegids Tudelft. 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: