Report Summary

  • 9

    Performance

    Renders faster than
    31% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    65% of websites

  • 86

    SEO

    Google-friendlier than
    66% of websites

aaas.org

AAAS Home | American Association for the Advancement of Science

Page Load Speed

1.5 sec in total

First Response

17 ms

Resources Loaded

1.2 sec

Page Rendered

283 ms

aaas.org screenshot

About Website

Welcome to aaas.org homepage info - get ready to check AAAS best content for China right away, or after learning these important things about aaas.org

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Key Findings

We analyzed Aaas.org page load time and found that the first response time was 17 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

aaas.org performance score

9

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value8.4 s

2/100

25%

SI (Speed Index)

Value7.5 s

27/100

10%

TBT (Total Blocking Time)

Value5,480 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.67

8/100

15%

TTI (Time to Interactive)

Value19.9 s

2/100

10%

Network Requests Diagram

aaas.org

17 ms

www.aaas.org

33 ms

satelliteLib-a9d46808a35b7b8034adfab1d8207407222304d5.js

174 ms

css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css

17 ms

css_y5V-74fl2u3TPnO7Vzl0srF2_LEAmcANj4_-6qPJyxk.css

20 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that 49% of them (42 requests) were addressed to the original Aaas.org, 13% (11 requests) were made to Assets.adobedtm.com and 6% (5 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (358 ms) relates to the external source Assets.adobedtm.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.4 MB (34%)

Content Size

4.0 MB

After Optimization

2.7 MB

In fact, the total size of Aaas.org main page is 4.0 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 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 38.6 kB

  • Original 49.3 kB
  • After minification 46.8 kB
  • After compression 10.7 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 38.6 kB or 78% of the original size.

Image Optimization

-14%

Potential reduce by 370.7 kB

  • Original 2.7 MB
  • After minification 2.3 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. Obviously, AAAS needs image optimization as it can save up to 370.7 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-71%

Potential reduce by 613.5 kB

  • Original 861.2 kB
  • After minification 794.5 kB
  • After compression 247.7 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 613.5 kB or 71% of the original size.

CSS Optimization

-83%

Potential reduce by 335.2 kB

  • Original 404.5 kB
  • After minification 400.2 kB
  • After compression 69.4 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. Aaas.org needs all CSS files to be minified and compressed as it can save up to 335.2 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 44 (59%)

Requests Now

75

After Optimization

31

The browser has sent 75 CSS, Javascripts, AJAX and image requests in order to completely render the main page of AAAS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 39 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

aaas.org accessibility score

71

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

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

High

[role] values are not valid

High

ARIA IDs are not unique

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

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

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

Best Practices

aaas.org best practices score

83

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

SEO Factors

aaas.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

Links do not have descriptive text

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

    EN

  • Encoding

    UTF-8

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

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