Tools & Wizards About Us
pretoria-astronomy.co.za screenshot

Report Summary

  • 96

    Performance

    Renders faster than
    94% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

pretoria-astronomy.co.za

Pretoria Centre of the Astronomical Society of Southern Africa

Page Load Speed

7.2 sec in total

First Response

2.3 sec

Resources Loaded

4.6 sec

Page Rendered

267 ms

pretoria-astronomy.co.za screenshot

About Website

Click here to check amazing Pretoria Astronomy content. Otherwise, check out these important facts you probably never knew about pretoria-astronomy.co.za

The Astronomical Society of South Africa, Pretoria Branch offers both amateur and professional astronomers the opportunity to discover the southern hemisphere skies and learn more about the stars, pla...

Visit pretoria-astronomy.co.za

Key Findings

We analyzed Pretoria-astronomy.co.za page load time and found that the first response time was 2.3 sec and then it took 4.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

pretoria-astronomy.co.za performance score

96

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

95/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

90/100

25%

SI (Speed Index)

Value3.4 s

90/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.8 s

100/100

10%

Network Requests Diagram

pretoria-astronomy.co.za

2273 ms

astronomical.css

598 ms

menu.txt

595 ms

counter_xhtml.js

8 ms

date.js

1132 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 75% of them (21 requests) were addressed to the original Pretoria-astronomy.co.za, 4% (1 request) were made to Statcounter.com and 4% (1 request) were made to Banners.wunderground.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Pretoria-astronomy.co.za.

Page Optimization Overview & Recommendations

Page size can be reduced by 27.8 kB (3%)

Content Size

960.8 kB

After Optimization

932.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Pretoria-astronomy.co.za main page is 960.8 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. 15% of websites need less resources to load. Images take 920.9 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 10.2 kB

  • Original 13.8 kB
  • After minification 10.2 kB
  • After compression 3.6 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. This page needs HTML code to be minified as it can gain 3.6 kB, which is 26% 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 10.2 kB or 74% of the original size.

Image Optimization

-0%

Potential reduce by 344 B

  • Original 920.9 kB
  • After minification 920.6 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. Pretoria Astronomy images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 15.8 kB

  • Original 24.0 kB
  • After minification 23.8 kB
  • After compression 8.2 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 15.8 kB or 66% of the original size.

CSS Optimization

-69%

Potential reduce by 1.4 kB

  • Original 2.1 kB
  • After minification 1.7 kB
  • After compression 643 B

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. Pretoria-astronomy.co.za needs all CSS files to be minified and compressed as it can save up to 1.4 kB or 69% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

26

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Pretoria Astronomy. According to our analytics all requests are already optimized.

Network Requests Diagram

pretoria-astronomy.co.za

pretoria-astronomy.co.za

2273 ms

astronomical.css

astronomical.css

598 ms

menu.txt

menu.txt

595 ms

counter_xhtml.js

counter_xhtml.js

8 ms

date.js

date.js

1132 ms

facebook_logo.jpg

facebook_logo.jpg

825 ms

68262.gif

68262.gif

374 ms

skymap

skymap

389 ms

planet-nine-160120c-02.jpg

planet-nine-160120c-02.jpg

73 ms

68262.gif

68262.gif

425 ms

planets_jupiter.jpg

planets_jupiter.jpg

326 ms

planets_mars.jpg

planets_mars.jpg

605 ms

planets_mercurius.jpg

planets_mercurius.jpg

1103 ms

planets_neptune.jpg

planets_neptune.jpg

558 ms

planets_pluto.jpg

planets_pluto.jpg

855 ms

planets_earth.jpg

planets_earth.jpg

613 ms

planets_saturn.jpg

planets_saturn.jpg

839 ms

planets_uranus.jpg

planets_uranus.jpg

897 ms

planets_venus.jpg

planets_venus.jpg

907 ms

assa_pretoria_logo.gif

assa_pretoria_logo.gif

1715 ms

constellations_andromeda.jpg

constellations_andromeda.jpg

1665 ms

mainpage_image_01.jpg

mainpage_image_01.jpg

1154 ms

mainpage_image_02.jpg

mainpage_image_02.jpg

1183 ms

mainpage_image_03.jpg

mainpage_image_03.jpg

1195 ms

mainpage_image_04.jpg

mainpage_image_04.jpg

1381 ms

t.php

t.php

55 ms

skymap

skymap

904 ms

print.css

print.css

293 ms

Accessibility Review

pretoria-astronomy.co.za accessibility score

69

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

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

pretoria-astronomy.co.za best practices score

67

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

High

Browser errors were logged to the console

SEO Factors

pretoria-astronomy.co.za SEO score

75

Search Engine Optimization Advices

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 Pretoria-astronomy.co.za 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 Pretoria-astronomy.co.za 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

pretoria-astronomy.co.za

Open Graph description is not detected on the main page of Pretoria Astronomy. 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: