Tools & Wizards About Us
harrisdulwichboys.org.uk screenshot

Report Summary

  • 14

    Performance

    Renders faster than
    26% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 74

    SEO

    Google-friendlier than
    31% of websites

harrisdulwichboys.org.uk

Welcome from the Principal - Harris Boys' Academy East Dulwich

Page Load Speed

5.7 sec in total

First Response

151 ms

Resources Loaded

5 sec

Page Rendered

584 ms

harrisdulwichboys.org.uk screenshot

About Website

Welcome to harrisdulwichboys.org.uk homepage info - get ready to check Harris Dulwich Boys best content right away, or after learning these important things about harrisdulwichboys.org.uk

Harris Boys' Academy East Dulwich is a new purpose built 11-18 school for boys which opened in September 2009 located in East Dulwich.

Visit harrisdulwichboys.org.uk

Key Findings

We analyzed Harrisdulwichboys.org.uk page load time and found that the first response time was 151 ms and then it took 5.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

harrisdulwichboys.org.uk performance score

14

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.0 s

1/100

10%

LCP (Largest Contentful Paint)

Value19.8 s

0/100

25%

SI (Speed Index)

Value13.9 s

1/100

10%

TBT (Total Blocking Time)

Value760 ms

38/100

30%

CLS (Cumulative Layout Shift)

Value0.492

17/100

15%

TTI (Time to Interactive)

Value20.7 s

2/100

10%

Network Requests Diagram

harrisdulwichboys.org.uk

151 ms

www.harrisdulwichboys.org.uk

652 ms

bootstrap_min.css

280 ms

font-awesome.min.css

53 ms

screen_1711444783.css

611 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 28% of them (20 requests) were addressed to the original Harrisdulwichboys.org.uk, 28% (20 requests) were made to 0e58658be539ee7325a0-220f04f871df648cf4a4d93a111e3366.ssl.cf3.rackcdn.com and 17% (12 requests) were made to Pbs.twimg.com. The less responsive or slowest element that took the longest time to load (3 sec) relates to the external source 0e58658be539ee7325a0-220f04f871df648cf4a4d93a111e3366.ssl.cf3.rackcdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 327.9 kB (9%)

Content Size

3.7 MB

After Optimization

3.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Harrisdulwichboys.org.uk main page is 3.7 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. 70% of websites need less resources to load. Images take 3.3 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 133.9 kB

  • Original 154.5 kB
  • After minification 147.6 kB
  • After compression 20.6 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 133.9 kB or 87% of the original size.

Image Optimization

-1%

Potential reduce by 48.4 kB

  • Original 3.3 MB
  • After minification 3.2 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. Harris Dulwich Boys images are well optimized though.

JavaScript Optimization

-26%

Potential reduce by 22.7 kB

  • Original 86.6 kB
  • After minification 83.9 kB
  • After compression 64.0 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 22.7 kB or 26% of the original size.

CSS Optimization

-87%

Potential reduce by 123.0 kB

  • Original 141.4 kB
  • After minification 111.4 kB
  • After compression 18.4 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. Harrisdulwichboys.org.uk needs all CSS files to be minified and compressed as it can save up to 123.0 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (17%)

Requests Now

64

After Optimization

53

  • Images
  • JavaScript
  • CSS

The browser has sent 64 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Harris Dulwich Boys. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

harrisdulwichboys.org.uk

harrisdulwichboys.org.uk

151 ms

www.harrisdulwichboys.org.uk

www.harrisdulwichboys.org.uk

652 ms

bootstrap_min.css

bootstrap_min.css

280 ms

font-awesome.min.css

font-awesome.min.css

53 ms

screen_1711444783.css

screen_1711444783.css

611 ms

jquery.min.js

jquery.min.js

39 ms

jquery.plugin.js

jquery.plugin.js

135 ms

swfobject.js

swfobject.js

145 ms

jquery.autocomplete.js

jquery.autocomplete.js

161 ms

screen.js

screen.js

92 ms

jquery.datepicker_1.8.js

jquery.datepicker_1.8.js

103 ms

site_script_1706607653.js

site_script_1706607653.js

894 ms

element.js

element.js

45 ms

cookie_popup_v5.css

cookie_popup_v5.css

211 ms

cookie_popup_v5.js

cookie_popup_v5.js

212 ms

3_5.jpg

3_5.jpg

1821 ms

GVlgxl_WYAA2ENr.jpg

GVlgxl_WYAA2ENr.jpg

1194 ms

4_7_s.png

4_7_s.png

1541 ms

GVlX45gW8AAvwUl.jpg

GVlX45gW8AAvwUl.jpg

1193 ms

GVGgN-bWIAAVAkV.jpg

GVGgN-bWIAAVAkV.jpg

1026 ms

GVBm8BbXQAApCsU.jpg

GVBm8BbXQAApCsU.jpg

1196 ms

GVBmwVrX0AEfsku.jpg

GVBmwVrX0AEfsku.jpg

1196 ms

GVBmiQ5XUAA32RA.jpg

GVBmiQ5XUAA32RA.jpg

1194 ms

GVBGZIQXwAAlna4.jpg

GVBGZIQXwAAlna4.jpg

1216 ms

GSMWa9Oa0AA-MtT.jpg

GSMWa9Oa0AA-MtT.jpg

1220 ms

GSIugk2WgAA3Suw.png

GSIugk2WgAA3Suw.png

1219 ms

GRenBaEWsAAtzaQ.jpg

GRenBaEWsAAtzaQ.jpg

1219 ms

GQ_Ysn2XsAEBr5D.jpg

GQ_Ysn2XsAEBr5D.jpg

1217 ms

GQQ7AGWXcAAhVnY.jpg

GQQ7AGWXcAAhVnY.jpg

1225 ms

3_6.jpg

3_6.jpg

1539 ms

2_4882_nht.jpg

2_4882_nht.jpg

1944 ms

2_4194_nht.jpg

2_4194_nht.jpg

1540 ms

2_4877_nht.jpg

2_4877_nht.jpg

1737 ms

2_4864_nht.jpg

2_4864_nht.jpg

2104 ms

2_4850_nht.jpg

2_4850_nht.jpg

2188 ms

2_4725_nht.jpg

2_4725_nht.jpg

2154 ms

5_7_h.jpg

5_7_h.jpg

2245 ms

5_10_h_v2.jpg

5_10_h_v2.jpg

2417 ms

5_11_h_v2.jpg

5_11_h_v2.jpg

2448 ms

5_12_h_v1.jpg

5_12_h_v1.jpg

2420 ms

5_14_h_v2.jpg

5_14_h_v2.jpg

2757 ms

2_1_sbw_v8.jpg

2_1_sbw_v8.jpg

2744 ms

2_2_sbw_v4.jpg

2_2_sbw_v4.jpg

2756 ms

2_3_sbw_v2.jpg

2_3_sbw_v2.jpg

3047 ms

big_overlay.png

big_overlay.png

277 ms

logo.png

logo.png

278 ms

twiter_wall_link.png

twiter_wall_link.png

278 ms

hide_show_side.png

hide_show_side.png

277 ms

side_panel_logo.png

side_panel_logo.png

1020 ms

loader.gif

loader.gif

1021 ms

home_day_bul.png

home_day_bul.png

1022 ms

footer_logo.png

footer_logo.png

1021 ms

harris_footer_logo.png

harris_footer_logo.png

1023 ms

2_1_s_v7.jpg

2_1_s_v7.jpg

2629 ms

2_2_s_v3.jpg

2_2_s_v3.jpg

2722 ms

2_3_s_v1.jpg

2_3_s_v1.jpg

2865 ms

footer_bul.png

footer_bul.png

980 ms

footer_cb_logo.png

footer_cb_logo.png

1056 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

812 ms

palatinolight1-webfont.svg

palatinolight1-webfont.svg

1061 ms

OpenSans-Semibold-webfont.svg

OpenSans-Semibold-webfont.svg

1060 ms

OpenSans-Light-webfont.svg

OpenSans-Light-webfont.svg

1192 ms

OpenSans-Regular-webfont.svg

OpenSans-Regular-webfont.svg

1190 ms

harris_icon.svg

harris_icon.svg

1053 ms

3_25_s.jpg

3_25_s.jpg

2488 ms

nav_sub.png

nav_sub.png

248 ms

home_header_grad_280.png

home_header_grad_280.png

249 ms

palatinolight1-webfont.ttf

palatinolight1-webfont.ttf

93 ms

OpenSans-Semibold-webfont.ttf

OpenSans-Semibold-webfont.ttf

93 ms

OpenSans-Light-webfont.ttf

OpenSans-Light-webfont.ttf

91 ms

OpenSans-Regular-webfont.ttf

OpenSans-Regular-webfont.ttf

32 ms

Accessibility Review

harrisdulwichboys.org.uk accessibility score

68

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

harrisdulwichboys.org.uk best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

harrisdulwichboys.org.uk SEO score

74

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

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Harrisdulwichboys.org.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 Harrisdulwichboys.org.uk 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

harrisdulwichboys.org.uk

Open Graph description is not detected on the main page of Harris Dulwich Boys. 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: