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astro.org screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 58

    Accessibility

    Visual factors better than
    that of 25% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 63

    SEO

    Google-friendlier than
    24% of websites

astro.org

Home - American Society for Radiation Oncology (ASTRO) - American Society for Radiation Oncology (ASTRO)

Page Load Speed

2.1 sec in total

First Response

69 ms

Resources Loaded

1.7 sec

Page Rendered

243 ms

astro.org screenshot

About Website

Click here to check amazing ASTRO content for United States. Otherwise, check out these important facts you probably never knew about astro.org

ASTRO is the premier radiation oncology society in the world, with more than 10,000 members who are physicians, nurses, biologists, physicists, radiation therapists, dosimetrists and other health care...

Visit astro.org

Key Findings

We analyzed Astro.org page load time and found that the first response time was 69 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

astro.org performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

4/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value1,010 ms

27/100

30%

CLS (Cumulative Layout Shift)

Value0.475

18/100

15%

TTI (Time to Interactive)

Value12.7 s

13/100

10%

Network Requests Diagram

astro.org

69 ms

astro.org

20 ms

www.astro.org

1177 ms

gtm.js

76 ms

jquery-3.6.4.js

32 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 76% of them (55 requests) were addressed to the original Astro.org, 4% (3 requests) were made to Googletagmanager.com and 4% (3 requests) were made to Code.jquery.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Astro.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 249.1 kB (12%)

Content Size

2.0 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Astro.org main page is 2.0 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 144.4 kB

  • Original 169.7 kB
  • After minification 131.3 kB
  • After compression 25.3 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 38.4 kB, which is 23% 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 144.4 kB or 85% of the original size.

Image Optimization

-3%

Potential reduce by 48.6 kB

  • Original 1.6 MB
  • After minification 1.5 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. ASTRO images are well optimized though.

JavaScript Optimization

-13%

Potential reduce by 33.6 kB

  • Original 254.3 kB
  • After minification 254.3 kB
  • After compression 220.7 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 33.6 kB or 13% of the original size.

CSS Optimization

-37%

Potential reduce by 22.6 kB

  • Original 61.8 kB
  • After minification 61.8 kB
  • After compression 39.2 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. Astro.org needs all CSS files to be minified and compressed as it can save up to 22.6 kB or 37% of the original size.

Requests Breakdown

Number of requests can be reduced by 34 (51%)

Requests Now

67

After Optimization

33

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ASTRO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

astro.org

astro.org

69 ms

astro.org

astro.org

20 ms

www.astro.org

www.astro.org

1177 ms

gtm.js

gtm.js

76 ms

jquery-3.6.4.js

jquery-3.6.4.js

32 ms

jquery.validate.js

jquery.validate.js

32 ms

jquery.validate.unobtrusive.js

jquery.validate.unobtrusive.js

45 ms

jquery.unobtrusive-ajax.min.js

jquery.unobtrusive-ajax.min.js

47 ms

jquery-ui.js

jquery-ui.js

54 ms

ffcaa41a95.js

ffcaa41a95.js

151 ms

jquery-ui.css

jquery-ui.css

70 ms

typeset.css

typeset.css

31 ms

responsiveStructures.css

responsiveStructures.css

51 ms

masterPageStyles.css

masterPageStyles.css

50 ms

astro_formStyles.css

astro_formStyles.css

50 ms

interiorstyles.css

interiorstyles.css

68 ms

myastrostyles.css

myastrostyles.css

68 ms

astroTransformation_styles.css

astroTransformation_styles.css

73 ms

newAstroStyles.css

newAstroStyles.css

72 ms

tabStyles.css

tabStyles.css

72 ms

css

css

71 ms

bootstrap.min.css

bootstrap.min.css

71 ms

bootstrap-theme.min.css

bootstrap-theme.min.css

72 ms

homePage.css

homePage.css

93 ms

masterPage_scripts.js

masterPage_scripts.js

94 ms

homepage_scripts.js

homepage_scripts.js

93 ms

astroTransformation_scripts.js

astroTransformation_scripts.js

93 ms

astroaddressautocomplete.js

astroaddressautocomplete.js

93 ms

bootstrap.min.js

bootstrap.min.js

93 ms

ASTROSiteSearch360.js

ASTROSiteSearch360.js

94 ms

systemFormComponents.min.js

systemFormComponents.min.js

94 ms

js

js

128 ms

analytics.js

analytics.js

16 ms

collect

collect

97 ms

app.js

app.js

295 ms

ASTRO_toplogo_name.png

ASTRO_toplogo_name.png

78 ms

sitesearch360-v14.min.js

sitesearch360-v14.min.js

154 ms

boomerang.min.js

boomerang.min.js

192 ms

Volunteer_Roadmap_HP.jpg

Volunteer_Roadmap_HP.jpg

53 ms

ADay24_hpBanner.jpg

ADay24_hpBanner.jpg

51 ms

radiopharm_homepagebanner.jpg

radiopharm_homepagebanner.jpg

51 ms

Academy_homepagebanner.jpg

Academy_homepagebanner.jpg

51 ms

AM24_home.jpg

AM24_home.jpg

122 ms

filler_slide.jpg

filler_slide.jpg

50 ms

ASTROgram_tab.jpg

ASTROgram_tab.jpg

124 ms

ibbot_tab.webp

ibbot_tab.webp

122 ms

radiopharm_tab.jpg

radiopharm_tab.jpg

123 ms

Spring24_ASTROnews_tab.jpg

Spring24_ASTROnews_tab.jpg

122 ms

PartialBreast_Tab.jpg

PartialBreast_Tab.jpg

124 ms

tab_Microphone_townHall.webp

tab_Microphone_townHall.webp

146 ms

tab_careerCenter.jpg

tab_careerCenter.jpg

132 ms

tab_academy.jpg

tab_academy.jpg

133 ms

tab_catalog.jpg

tab_catalog.jpg

132 ms

roils_tab.jpg

roils_tab.jpg

133 ms

APEx_tab.jpg

APEx_tab.jpg

131 ms

ANewsWinter23_tab.jpg

ANewsWinter23_tab.jpg

137 ms

tab_advances.jpg

tab_advances.jpg

135 ms

tab_redJournal.webp

tab_redJournal.webp

181 ms

tab_pro.webp

tab_pro.webp

179 ms

CodingResource_tab.jpg

CodingResource_tab.jpg

180 ms

tab_safetyNoAccident.jpg

tab_safetyNoAccident.jpg

181 ms

tab_arro.jpg

tab_arro.jpg

179 ms

tab_adrop.jpg

tab_adrop.jpg

181 ms

tab_scarop.jpg

tab_scarop.jpg

192 ms

tab_earlyCareer.jpg

tab_earlyCareer.jpg

193 ms

medStudent_tab.jpg

medStudent_tab.jpg

193 ms

exhibitHall_tab.jpg

exhibitHall_tab.jpg

193 ms

js

js

148 ms

SlGVmQWMvZQIdix7AFxXkHNSaw.woff

SlGVmQWMvZQIdix7AFxXkHNSaw.woff

87 ms

SlGWmQWMvZQIdix7AFxXmMh3eDs1YQ.woff

SlGWmQWMvZQIdix7AFxXmMh3eDs1YQ.woff

94 ms

ss360-unibox-v14.chunk.ab353d8ed5a2bab66a62.js

ss360-unibox-v14.chunk.ab353d8ed5a2bab66a62.js

87 ms

ss360-styles-v14.chunk.955bfef94a96558909fb.js

ss360-styles-v14.chunk.955bfef94a96558909fb.js

101 ms

Accessibility Review

astro.org accessibility score

58

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-*] attributes do not match their roles

High

ARIA IDs are not unique

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.

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

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

astro.org 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

astro.org SEO score

63

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

    UTF-8

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

astro.org

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