Tools & Wizards About Us
albartlett.org screenshot

Report Summary

  • 98

    Performance

    Renders faster than
    95% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

albartlett.org

Professor Emeritus Al Bartlett - Physics at University of Colorado at Boulder - articles on exponential growth, peak oil and population growth, sustai...

Page Load Speed

1.4 sec in total

First Response

196 ms

Resources Loaded

1.1 sec

Page Rendered

147 ms

albartlett.org screenshot

About Website

Welcome to albartlett.org homepage info - get ready to check Al Bartlett best content for United States right away, or after learning these important things about albartlett.org

Professor Emeritus Al Bartlett - Physics at University of Colorado at Boulder - articles on exponential growth, peak oil and population growth, sustainability, renewable resources and the environment

Visit albartlett.org

Key Findings

We analyzed Albartlett.org page load time and found that the first response time was 196 ms and then it took 1.2 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

albartlett.org performance score

98

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

87/100

10%

LCP (Largest Contentful Paint)

Value1.9 s

98/100

25%

SI (Speed Index)

Value2.4 s

98/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.9 s

100/100

10%

Network Requests Diagram

albartlett.org

196 ms

albartlett.org

261 ms

www.albartlett.org

323 ms

ab.css

67 ms

ab_banner_home_page.jpg

187 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that all of those requests were addressed to Albartlett.org and no external sources were called. The less responsive or slowest element that took the longest time to load (323 ms) belongs to the original domain Albartlett.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 21.8 kB (20%)

Content Size

111.6 kB

After Optimization

89.8 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Albartlett.org main page is 111.6 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 5% of websites need less resources to load. Images take 102.6 kB which makes up the majority of the site volume.

HTML Optimization

-65%

Potential reduce by 3.5 kB

  • Original 5.4 kB
  • After minification 5.3 kB
  • After compression 1.9 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 3.5 kB or 65% of the original size.

Image Optimization

-17%

Potential reduce by 16.9 kB

  • Original 102.6 kB
  • After minification 85.7 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. Obviously, Al Bartlett needs image optimization as it can save up to 16.9 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-39%

Potential reduce by 1.4 kB

  • Original 3.6 kB
  • After minification 3.6 kB
  • After compression 2.2 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. Albartlett.org needs all CSS files to be minified and compressed as it can save up to 1.4 kB or 39% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (45%)

Requests Now

11

After Optimization

6

  • Images
  • CSS

The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Al Bartlett. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

albartlett.org

albartlett.org

196 ms

albartlett.org

albartlett.org

261 ms

www.albartlett.org

www.albartlett.org

323 ms

ab.css

ab.css

67 ms

ab_banner_home_page.jpg

ab_banner_home_page.jpg

187 ms

ab_exponential_home_page_right_part.png

ab_exponential_home_page_right_part.png

237 ms

audio.gif

audio.gif

185 ms

al_bartlett_cu_1_main.jpg

al_bartlett_cu_1_main.jpg

308 ms

ab_graph_paper_bg7.gif

ab_graph_paper_bg7.gif

127 ms

ab_page_body_bg.gif

ab_page_body_bg.gif

198 ms

ab_left_nav_top.gif

ab_left_nav_top.gif

199 ms

ab_left_nav_mid.gif

ab_left_nav_mid.gif

199 ms

ab_left_nav_bottom.gif

ab_left_nav_bottom.gif

200 ms

ab_page_footer.gif

ab_page_footer.gif

238 ms

Accessibility Review

albartlett.org accessibility score

84

Accessibility Issues

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

Best Practices

albartlett.org 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

SEO Factors

albartlett.org SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Albartlett.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 Albartlett.org main page’s claimed encoding is iso-8859-1. 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

albartlett.org

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