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energy.gov screenshot

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

energy.gov

Department of Energy

Page Load Speed

53.7 sec in total

First Response

1.4 sec

Resources Loaded

20.8 sec

Page Rendered

31.5 sec

energy.gov screenshot

About Website

Welcome to energy.gov homepage info - get ready to check Energy best content for United States right away, or after learning these important things about energy.gov

Visit energy.gov

Key Findings

We analyzed Energy.gov page load time and found that the first response time was 1.4 sec and then it took 52.3 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

energy.gov performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

47/100

10%

LCP (Largest Contentful Paint)

Value8.6 s

1/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value1,940 ms

8/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value9.5 s

30/100

10%

Network Requests Diagram

energy.gov

1377 ms

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865 ms

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926 ms

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1123 ms

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1128 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that 89% of them (55 requests) were addressed to the original Energy.gov, 3% (2 requests) were made to Ssl.google-analytics.com and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (13.8 sec) relates to the external source Dap.digitalgov.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.1 MB (23%)

Content Size

9.2 MB

After Optimization

7.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Energy.gov main page is 9.2 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. 80% 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 7.1 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 88.0 kB

  • Original 103.6 kB
  • After minification 96.2 kB
  • After compression 15.6 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. 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 88.0 kB or 85% of the original size.

Image Optimization

-5%

Potential reduce by 385.4 kB

  • Original 7.1 MB
  • After minification 6.7 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. Energy images are well optimized though.

JavaScript Optimization

-78%

Potential reduce by 1.0 MB

  • Original 1.3 MB
  • After minification 870.3 kB
  • After compression 289.2 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 1.0 MB or 78% of the original size.

CSS Optimization

-86%

Potential reduce by 599.5 kB

  • Original 697.4 kB
  • After minification 660.0 kB
  • After compression 97.9 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. Energy.gov needs all CSS files to be minified and compressed as it can save up to 599.5 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (42%)

Requests Now

57

After Optimization

33

  • Images
  • JavaScript
  • CSS

The browser has sent 57 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Energy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

energy.gov

energy.gov

1377 ms

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926 ms

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1128 ms

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1149 ms

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1149 ms

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1134 ms

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1232 ms

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1223 ms

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5915 ms

clean_energy_mediaqueries.js

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2828 ms

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2912 ms

clean_energy_header.js

clean_energy_header.js

2827 ms

clean_energy_footer.js

clean_energy_footer.js

5784 ms

clean_energy_overlay.js

clean_energy_overlay.js

5784 ms

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5731 ms

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7888 ms

enquire.min.js

enquire.min.js

7389 ms

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7389 ms

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7494 ms

clean_energy_listings.js

clean_energy_listings.js

7390 ms

Universal-Federated-Analytics-Min.js

Universal-Federated-Analytics-Min.js

13773 ms

energy_crest_smaller.png

energy_crest_smaller.png

7483 ms

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Magnifying_glass_icon.svg

13647 ms

SolarEclipseHomePage_1.png

SolarEclipseHomePage_1.png

13703 ms

logo_footer_white.png

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13683 ms

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11278 ms

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437 ms

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48 ms

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138 ms

Accessibility Review

energy.gov accessibility score

94

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

energy.gov best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

energy.gov SEO score

77

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

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

    N/A

  • Encoding

    UTF-8

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

energy.gov

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