Tools & Wizards About Us
cbastro.org screenshot

Report Summary

  • 60

    Performance

    Renders faster than
    76% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

cbastro.org

CBA – Center for Backyard Astrophysics

Page Load Speed

446 ms in total

First Response

76 ms

Resources Loaded

127 ms

Page Rendered

243 ms

cbastro.org screenshot

About Website

Click here to check amazing CBA Stro content. Otherwise, check out these important facts you probably never knew about cbastro.org

a global network of small telescopes dedicated to photometry of cataclysmic variables, cba, center for backyard astrophysics, cbastro, cbastro.org, backyard, astrophysics, amateur, astronomy

Visit cbastro.org

Key Findings

We analyzed Cbastro.org page load time and found that the first response time was 76 ms and then it took 370 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

cbastro.org performance score

60

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

26/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

2/100

25%

SI (Speed Index)

Value4.4 s

73/100

10%

TBT (Total Blocking Time)

Value90 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.042

99/100

15%

TTI (Time to Interactive)

Value7.1 s

52/100

10%

Network Requests Diagram

cbastro.org

76 ms

bg.gif

11 ms

blank.gif

17 ms

logo.gif

19 ms

title.gif

18 ms

Our browser made a total of 10 requests to load all elements on the main page. We found that all of those requests were addressed to Cbastro.org and no external sources were called. The less responsive or slowest element that took the longest time to load (76 ms) belongs to the original domain Cbastro.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 27.3 kB (65%)

Content Size

42.0 kB

After Optimization

14.8 kB

  • HTML
  • Images

In fact, the total size of Cbastro.org main page is 42.0 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. HTML takes 31.6 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 27.3 kB

  • Original 31.6 kB
  • After minification 21.1 kB
  • After compression 4.3 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 10.5 kB, which is 33% 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 27.3 kB or 86% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 10.5 kB
  • After minification 10.5 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. CBA Stro images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

9

After Optimization

9

  • Images

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CBA Stro. According to our analytics all requests are already optimized.

Network Requests Diagram

cbastro.org

cbastro.org

76 ms

bg.gif

bg.gif

11 ms

blank.gif

blank.gif

17 ms

logo.gif

logo.gif

19 ms

title.gif

title.gif

18 ms

space.gif

space.gif

19 ms

xearth7.gif

xearth7.gif

20 ms

tiny.jpg

tiny.jpg

18 ms

map.gif

map.gif

32 ms

v803cen.gif

v803cen.gif

25 ms

Accessibility Review

cbastro.org accessibility score

83

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-hidden="true"] elements contain focusable descendents

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

cbastro.org best practices score

75

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

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

cbastro.org SEO score

86

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

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cbastro.org 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 Cbastro.org main page’s claimed encoding is . 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

cbastro.org

Open Graph description is not detected on the main page of CBA Stro. 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: