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Report Summary

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    Performance

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    Accessibility

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    Best Practices

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    SEO

energyplus.gov

Building Technologies Office: EnergyPlus Energy Simulation Software

Page Load Speed

947 ms in total

First Response

86 ms

Resources Loaded

724 ms

Page Rendered

137 ms

energyplus.gov screenshot

About Website

Welcome to energyplus.gov homepage info - get ready to check Energy Plus best content right away, or after learning these important things about energyplus.gov

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Key Findings

We analyzed Energyplus.gov page load time and found that the first response time was 86 ms and then it took 861 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

energyplus.gov performance score

0

Network Requests Diagram

energyplus.gov

86 ms

79 ms

131 ms

main_green.css

86 ms

site.css

91 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original Energyplus.gov, 35% (9 requests) were made to Apps1.eere.energy.gov and 19% (5 requests) were made to Www1.eere.energy.gov. The less responsive or slowest element that took the longest time to load (188 ms) relates to the external source Www1.eere.energy.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 102.9 kB (70%)

Content Size

147.8 kB

After Optimization

44.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Energyplus.gov main page is 147.8 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. 15% of websites need less resources to load. Javascripts take 106.2 kB which makes up the majority of the site volume.

HTML Optimization

-63%

Potential reduce by 5.2 kB

  • Original 8.3 kB
  • After minification 8.0 kB
  • After compression 3.1 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 5.2 kB or 63% of the original size.

Image Optimization

-1%

Potential reduce by 32 B

  • Original 2.9 kB
  • After minification 2.9 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. Energy Plus images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 72.8 kB

  • Original 106.2 kB
  • After minification 93.1 kB
  • After compression 33.4 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 72.8 kB or 69% of the original size.

CSS Optimization

-82%

Potential reduce by 24.9 kB

  • Original 30.4 kB
  • After minification 22.9 kB
  • After compression 5.5 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. Energyplus.gov needs all CSS files to be minified and compressed as it can save up to 24.9 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (38%)

Requests Now

21

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Energy Plus. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

energyplus.gov

energyplus.gov

86 ms

79 ms

131 ms

main_green.css

main_green.css

86 ms

site.css

site.css

91 ms

jquery.min.js

jquery.min.js

25 ms

eere.icons.jquery.js

eere.icons.jquery.js

127 ms

eere.breadcrumb.jquery.js

eere.breadcrumb.jquery.js

125 ms

addthis_accessible.js

addthis_accessible.js

127 ms

leaving_eere.js

leaving_eere.js

129 ms

7226.js

7226.js

31 ms

eere.js

eere.js

79 ms

header_logo.gif

header_logo.gif

45 ms

spacer.gif

spacer.gif

48 ms

reveal.css

reveal.css

131 ms

jquery.reveal.js

jquery.reveal.js

188 ms

analytics.js

analytics.js

5 ms

collect

collect

11 ms

collect

collect

14 ms

collect

collect

83 ms

s

s

33 ms

modal_arrow_left.gif

modal_arrow_left.gif

44 ms

modal_arrow_right.gif

modal_arrow_right.gif

62 ms

modal-gloss.png

modal-gloss.png

87 ms

u

u

31 ms

ga-audiences

ga-audiences

35 ms

SEO Factors

energyplus.gov SEO score

0

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 Energyplus.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 Energyplus.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

energyplus.gov

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