Tools & Wizards About Us
social-glass.tudelft.nl screenshot

Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

social-glass.tudelft.nl

SocialGlass - Understanding Cities through Social Big Data

Page Load Speed

4.2 sec in total

First Response

374 ms

Resources Loaded

3.6 sec

Page Rendered

240 ms

social-glass.tudelft.nl screenshot

About Website

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

Gigabytes of data about urban activities and social interactions are produced every day. Learn how SocialGlass can help policy-makers make better sense of it.

Visit social-glass.tudelft.nl

Key Findings

We analyzed Social-glass.tudelft.nl page load time and found that the first response time was 374 ms and then it took 3.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

social-glass.tudelft.nl performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

80/100

10%

LCP (Largest Contentful Paint)

Value23.7 s

0/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value1,370 ms

16/100

30%

CLS (Cumulative Layout Shift)

Value0.079

94/100

15%

TTI (Time to Interactive)

Value6.9 s

53/100

10%

Network Requests Diagram

social-glass.tudelft.nl

374 ms

social-glass.tudelft.nl

1763 ms

core_style.css

277 ms

light_style.css

284 ms

frontend.js

181 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 69% of them (34 requests) were addressed to the original Social-glass.tudelft.nl, 20% (10 requests) were made to Fonts.gstatic.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Social-glass.tudelft.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.5 MB (41%)

Content Size

6.2 MB

After Optimization

3.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Social-glass.tudelft.nl main page is 6.2 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. 60% of websites need less resources to load. Images take 5.5 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 140.7 kB

  • Original 167.0 kB
  • After minification 164.9 kB
  • After compression 26.4 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 140.7 kB or 84% of the original size.

Image Optimization

-37%

Potential reduce by 2.0 MB

  • Original 5.5 MB
  • After minification 3.5 MB

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. Obviously, Social Glass Tudelft needs image optimization as it can save up to 2.0 MB or 37% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-69%

Potential reduce by 296.4 kB

  • Original 431.6 kB
  • After minification 425.5 kB
  • After compression 135.2 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 296.4 kB or 69% of the original size.

CSS Optimization

-86%

Potential reduce by 88.2 kB

  • Original 102.9 kB
  • After minification 102.5 kB
  • After compression 14.6 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. Social-glass.tudelft.nl needs all CSS files to be minified and compressed as it can save up to 88.2 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (37%)

Requests Now

35

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Social Glass 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 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

social-glass.tudelft.nl

social-glass.tudelft.nl

374 ms

social-glass.tudelft.nl

social-glass.tudelft.nl

1763 ms

core_style.css

core_style.css

277 ms

light_style.css

light_style.css

284 ms

frontend.js

frontend.js

181 ms

et-divi-customizer-global.min.css

et-divi-customizer-global.min.css

189 ms

jquery.min.js

jquery.min.js

315 ms

jquery-migrate.min.js

jquery-migrate.min.js

208 ms

collapse.js

collapse.js

314 ms

scripts.min.js

scripts.min.js

653 ms

smoothscroll.js

smoothscroll.js

209 ms

jquery.mobile.js

jquery.mobile.js

330 ms

common.js

common.js

330 ms

115172539

115172539

234 ms

SocialGlass-Logo_bw_small.png

SocialGlass-Logo_bw_small.png

293 ms

AMS_Logo_small.jpg

AMS_Logo_small.jpg

292 ms

TUD_Logo-2.jpg

TUD_Logo-2.jpg

294 ms

SURFsara_logo.jpg

SURFsara_logo.jpg

297 ms

EIT_Digital_Logo.jpg

EIT_Digital_Logo.jpg

390 ms

320px-IBM_logo.svg_.png

320px-IBM_logo.svg_.png

422 ms

BOLD_Logo-1.jpg

BOLD_Logo-1.jpg

518 ms

ibm_PNG19655.png

ibm_PNG19655.png

429 ms

ALLEGRO_Logo.jpg

ALLEGRO_Logo.jpg

431 ms

AmsCity_Logo.jpg

AmsCity_Logo.jpg

485 ms

FdlC_Logo.jpg

FdlC_Logo.jpg

517 ms

TIM_Logo.jpg

TIM_Logo.jpg

523 ms

FBK_Logo.jpg

FBK_Logo.jpg

528 ms

FLUXEDO_Logo.jpg

FLUXEDO_Logo.jpg

620 ms

KPN_Logo.jpg

KPN_Logo.jpg

619 ms

DAT.Mobility_logo.jpg

DAT.Mobility_logo.jpg

620 ms

analytics.js

analytics.js

55 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0C4k.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0C4k.woff

43 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0C4n.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0C4n.ttf

56 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0C4k.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0C4k.woff

66 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0C4n.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0C4n.ttf

67 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1y4k.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1y4k.woff

67 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1y4n.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1y4n.ttf

75 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1y4k.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1y4k.woff

79 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1y4n.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1y4n.ttf

64 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1y4k.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1y4k.woff

76 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1y4n.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgshZ1y4n.ttf

79 ms

modules.ttf

modules.ttf

570 ms

collect

collect

37 ms

js

js

62 ms

api.js

api.js

10 ms

AMS_4SQ_POIs-1.png

AMS_4SQ_POIs-1.png

468 ms

SAIL_crowd.jpg

SAIL_crowd.jpg

189 ms

S4.png

S4.png

655 ms

style.min.css

style.min.css

97 ms

Accessibility Review

social-glass.tudelft.nl accessibility score

81

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.

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

social-glass.tudelft.nl best practices score

75

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

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

social-glass.tudelft.nl SEO score

93

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Social-glass.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 Social-glass.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.

Social Sharing Optimization

social-glass.tudelft.nl

Open Graph data is detected on the main page of Social Glass Tudelft. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: