Tools & Wizards About Us

Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

blackheathhighschool.gdst.net

Blackheath High School: Home

Page Load Speed

2.6 sec in total

First Response

148 ms

Resources Loaded

2.1 sec

Page Rendered

338 ms

About Website

Click here to check amazing Blackheath High School Gdst content for United Kingdom. Otherwise, check out these important facts you probably never knew about blackheathhighschool.gdst.net

Blackheath High School is an independent day school for girls age 3-18, based in South East London. Find out why this is a place where girls boldly go.

Visit blackheathhighschool.gdst.net

Key Findings

We analyzed Blackheathhighschool.gdst.net page load time and found that the first response time was 148 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

blackheathhighschool.gdst.net performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value12.5 s

0/100

25%

SI (Speed Index)

Value6.5 s

38/100

10%

TBT (Total Blocking Time)

Value410 ms

67/100

30%

CLS (Cumulative Layout Shift)

Value0.535

14/100

15%

TTI (Time to Interactive)

Value10.1 s

26/100

10%

Network Requests Diagram

blackheathhighschool.gdst.net

148 ms

www.blackheathhighschool.gdst.net

438 ms

font-awesome.min.css

33 ms

css2

101 ms

styles.css

141 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 27% of them (10 requests) were addressed to the original Blackheathhighschool.gdst.net, 51% (19 requests) were made to 4905753ff3cea231a868-376d75cd2890937de6f542499f88a819.ssl.cf3.rackcdn.com and 11% (4 requests) were made to Fonts.cleverbox.co.uk. The less responsive or slowest element that took the longest time to load (749 ms) relates to the external source 4905753ff3cea231a868-376d75cd2890937de6f542499f88a819.ssl.cf3.rackcdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 75.8 kB (3%)

Content Size

2.7 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Blackheathhighschool.gdst.net main page is 2.7 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. 65% of websites need less resources to load. Images take 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 65.5 kB

  • Original 80.8 kB
  • After minification 72.2 kB
  • After compression 15.3 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 8.5 kB, which is 11% 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 65.5 kB or 81% of the original size.

Image Optimization

-0%

Potential reduce by 9.9 kB

  • Original 2.4 MB
  • After minification 2.4 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. Blackheath High School Gdst images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 128 B

  • Original 176.2 kB
  • After minification 176.2 kB
  • After compression 176.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-1%

Potential reduce by 401 B

  • Original 63.9 kB
  • After minification 63.9 kB
  • After compression 63.5 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. Blackheathhighschool.gdst.net has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 6 (21%)

Requests Now

29

After Optimization

23

  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blackheath High School Gdst. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

blackheathhighschool.gdst.net accessibility score

85

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA input fields do not have accessible names

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

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

blackheathhighschool.gdst.net best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

blackheathhighschool.gdst.net SEO score

83

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

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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blackheathhighschool.gdst.net 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 Blackheathhighschool.gdst.net 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

Open Graph description is not detected on the main page of Blackheath High School Gdst. 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: