Tools & Wizards About Us
csr.city.ac.uk screenshot

Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

csr.city.ac.uk

Centre for Software Reliability • City, University of London

Page Load Speed

3.1 sec in total

First Response

254 ms

Resources Loaded

2.4 sec

Page Rendered

449 ms

csr.city.ac.uk screenshot

About Website

Click here to check amazing Csr City content for United Kingdom. Otherwise, check out these important facts you probably never knew about csr.city.ac.uk

The activities of this centre mainly concern the assessment and assurance of the dependability of socio-technical systems.

Visit csr.city.ac.uk

Key Findings

We analyzed Csr.city.ac.uk page load time and found that the first response time was 254 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

csr.city.ac.uk performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value6.2 s

11/100

25%

SI (Speed Index)

Value6.3 s

41/100

10%

TBT (Total Blocking Time)

Value2,150 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value15.9 s

6/100

10%

Network Requests Diagram

csr.city.ac.uk

254 ms

software-reliability

144 ms

vendor-dependencies.js

116 ms

vendor-direct.js

155 ms

axios.js

510 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Csr.city.ac.uk, 96% (44 requests) were made to City.ac.uk and 2% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source City.ac.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 682.5 kB (60%)

Content Size

1.1 MB

After Optimization

445.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Csr.city.ac.uk main page is 1.1 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. 60% of websites need less resources to load. HTML takes 488.1 kB which makes up the majority of the site volume.

HTML Optimization

-95%

Potential reduce by 465.9 kB

  • Original 488.1 kB
  • After minification 158.0 kB
  • After compression 22.2 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 330.1 kB, which is 68% 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 465.9 kB or 95% of the original size.

Image Optimization

-57%

Potential reduce by 209.6 kB

  • Original 368.2 kB
  • After minification 158.7 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. Obviously, Csr City needs image optimization as it can save up to 209.6 kB or 57% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-1%

Potential reduce by 1.9 kB

  • Original 150.2 kB
  • After minification 150.2 kB
  • After compression 148.3 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. This website has mostly compressed JavaScripts.

CSS Optimization

-4%

Potential reduce by 5.1 kB

  • Original 121.7 kB
  • After minification 121.7 kB
  • After compression 116.6 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. Csr.city.ac.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 6 (32%)

Requests Now

19

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Csr City. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

csr.city.ac.uk

csr.city.ac.uk

254 ms

software-reliability

software-reliability

144 ms

vendor-dependencies.js

vendor-dependencies.js

116 ms

vendor-direct.js

vendor-direct.js

155 ms

axios.js

axios.js

510 ms

react.js

react.js

150 ms

main.js

main.js

194 ms

search.js

search.js

169 ms

gtm.js

gtm.js

91 ms

main.css

main.css

285 ms

city-university-london-responsive.svg

city-university-london-responsive.svg

259 ms

breakpoint-max.jpg

breakpoint-max.jpg

268 ms

TEF-2023-silver-logo.svg

TEF-2023-silver-logo.svg

498 ms

ofsted-good-provider-white.svg

ofsted-good-provider-white.svg

496 ms

Advance-HE-Membership-logo_Standalone_AS-Bronze_WO.png

Advance-HE-Membership-logo_Standalone_AS-Bronze_WO.png

501 ms

stonewall-lgbtq-top-100-employer-white.svg

stonewall-lgbtq-top-100-employer-white.svg

501 ms

stonewall-lgbtq-silver-award-2023-white.svg

stonewall-lgbtq-silver-award-2023-white.svg

503 ms

Advance-HE-Membership-logo_Standalone_REC-Bronze_WO_lrg.png

Advance-HE-Membership-logo_Standalone_REC-Bronze_WO_lrg.png

508 ms

uk-ri-research-england-white.svg

uk-ri-research-england-white.svg

504 ms

disablity-confident-white.svg

disablity-confident-white.svg

505 ms

university-of-london-white.svg

university-of-london-white.svg

508 ms

IBMPlexSans-SemiBold.woff

IBMPlexSans-SemiBold.woff

123 ms

IBMPlexSans-Bold.woff

IBMPlexSans-Bold.woff

302 ms

IBMPlexSans-Medium.woff

IBMPlexSans-Medium.woff

303 ms

IBMPlexSans-Text.woff

IBMPlexSans-Text.woff

107 ms

IBMPlexSans-Regular.woff

IBMPlexSans-Regular.woff

233 ms

IBMPlexSans-Light.woff

IBMPlexSans-Light.woff

266 ms

IBMPlexSans-ExtraLight.woff

IBMPlexSans-ExtraLight.woff

353 ms

IBMPlexSans-Thin.woff

IBMPlexSans-Thin.woff

395 ms

ff-meta-w06-light.woff

ff-meta-w06-light.woff

382 ms

ff-meta-w06-thin.woff

ff-meta-w06-thin.woff

524 ms

ff-meta-w06-hairline.woff

ff-meta-w06-hairline.woff

575 ms

ff-meta-w06-normal.woff

ff-meta-w06-normal.woff

543 ms

ff-meta-w06-book.woff

ff-meta-w06-book.woff

892 ms

ff-meta-w06-medium.woff

ff-meta-w06-medium.woff

488 ms

ff-meta-w06-bold.woff

ff-meta-w06-bold.woff

644 ms

ff-meta-w06-black.woff

ff-meta-w06-black.woff

722 ms

fa-sharp-regular-400.ttf

fa-sharp-regular-400.ttf

813 ms

fa-sharp-light-300.ttf

fa-sharp-light-300.ttf

684 ms

fa-sharp-thin-100.ttf

fa-sharp-thin-100.ttf

933 ms

fa-sharp-solid-900.ttf

fa-sharp-solid-900.ttf

772 ms

fa-regular-400.ttf

fa-regular-400.ttf

825 ms

fa-light-300.ttf

fa-light-300.ttf

825 ms

fa-thin-100.ttf

fa-thin-100.ttf

1299 ms

fa-solid-900.ttf

fa-solid-900.ttf

1096 ms

fa-brands-400.ttf

fa-brands-400.ttf

959 ms

Accessibility Review

csr.city.ac.uk accessibility score

100

Accessibility Issues

Best Practices

csr.city.ac.uk best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

csr.city.ac.uk SEO score

100

Search Engine Optimization Advices

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 Csr.city.ac.uk 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 Csr.city.ac.uk 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

csr.city.ac.uk

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