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collage.cityoflondon.gov.uk screenshot

Report Summary

  • 46

    Performance

    Renders faster than
    65% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 92% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 88

    SEO

    Google-friendlier than
    66% of websites

collage.cityoflondon.gov.uk

London Picture Archive

Page Load Speed

12.1 sec in total

First Response

163 ms

Resources Loaded

11.8 sec

Page Rendered

171 ms

collage.cityoflondon.gov.uk screenshot

About Website

Welcome to collage.cityoflondon.gov.uk homepage info - get ready to check Collage Cityof London best content for United Kingdom right away, or after learning these important things about collage.cityoflondon.gov.uk

Over 250,000 images of London from the collections at London Metropolitan Archives and Guildhall Art Gallery

Visit collage.cityoflondon.gov.uk

Key Findings

We analyzed Collage.cityoflondon.gov.uk page load time and found that the first response time was 163 ms and then it took 12 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

collage.cityoflondon.gov.uk performance score

46

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value32.7 s

0/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.142

78/100

15%

TTI (Time to Interactive)

Value22.2 s

1/100

10%

Network Requests Diagram

app

163 ms

ga.js

5 ms

app.css

228 ms

__utm.gif

12 ms

COL_LOGO_2COL_BLK_RGB.GIF

163 ms

Our browser made a total of 19 requests to load all elements on the main page. We found that 89% of them (17 requests) were addressed to the original Collage.cityoflondon.gov.uk, 11% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (10.1 sec) belongs to the original domain Collage.cityoflondon.gov.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 28.7 kB (7%)

Content Size

398.6 kB

After Optimization

369.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Collage.cityoflondon.gov.uk main page is 398.6 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 356.3 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 5.1 kB

  • Original 7.5 kB
  • After minification 7.3 kB
  • After compression 2.4 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 5.1 kB or 68% of the original size.

Image Optimization

-2%

Potential reduce by 8.8 kB

  • Original 356.3 kB
  • After minification 347.5 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. Collage Cityof London images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 34 B

  • Original 17.2 kB
  • After minification 17.2 kB
  • After compression 17.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-84%

Potential reduce by 14.8 kB

  • Original 17.7 kB
  • After minification 12.9 kB
  • After compression 2.9 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. Collage.cityoflondon.gov.uk needs all CSS files to be minified and compressed as it can save up to 14.8 kB or 84% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

17

After Optimization

17

  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Collage Cityof London. According to our analytics all requests are already optimized.

Network Requests Diagram

app

app

163 ms

ga.js

ga.js

5 ms

app.css

app.css

228 ms

__utm.gif

__utm.gif

12 ms

COL_LOGO_2COL_BLK_RGB.GIF

COL_LOGO_2COL_BLK_RGB.GIF

163 ms

rollover.png

rollover.png

925 ms

howtobuy.png

howtobuy.png

161 ms

exhib.png

exhib.png

233 ms

Services.png

Services.png

161 ms

rotating_display.gif

rotating_display.gif

10070 ms

lonBW.png

lonBW.png

551 ms

Tramways_mag_rollover.png

Tramways_mag_rollover.png

553 ms

Gilbert2.png

Gilbert2.png

812 ms

ibaselogo.gif

ibaselogo.gif

311 ms

COLLAGE_red_RGB_smaller.jpg

COLLAGE_red_RGB_smaller.jpg

466 ms

rollover_f2.png

rollover_f2.png

1081 ms

howtobuy_f2.png

howtobuy_f2.png

79 ms

exhib_f2.png

exhib_f2.png

158 ms

Services_f2.png

Services_f2.png

80 ms

Accessibility Review

collage.cityoflondon.gov.uk accessibility score

97

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.

Best Practices

collage.cityoflondon.gov.uk best practices score

83

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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

collage.cityoflondon.gov.uk SEO score

88

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Collage.cityoflondon.gov.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Collage.cityoflondon.gov.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

collage.cityoflondon.gov.uk

Open Graph description is not detected on the main page of Collage Cityof London. 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: