Access eere.energy.gov. Office of Energy Efficiency and Renewable Energy

eere.energy.gov

59 ms

www.eere.energy.gov

88 ms

44 ms

office-energy-efficiency-renewable-energy

36 ms

js

97 ms

Our browser made a total of 67 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Eere.energy.gov, 39% (26 requests) were made to Energy.gov and 13% (9 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (322 ms) relates to the external source Www1.eere.energy.gov.

Content Size

3.2 MB

After Optimization

2.5 MB

In fact, the total size of Eere.energy.gov main page is 3.2 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. 70% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 73.7 kB

Original 89.9 kB
After minification 72.3 kB
After compression 16.3 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 17.6 kB, which is 20% 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 73.7 kB or 82% of the original size.

Image Optimization

-23%

Potential reduce by 624.2 kB

Original 2.7 MB
After minification 2.1 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, Eere Energy needs image optimization as it can save up to 624.2 kB or 23% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-9%

Potential reduce by 32.5 kB

Original 374.5 kB
After minification 374.4 kB
After compression 342.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-2%

Potential reduce by 2.1 kB

Original 86.0 kB
After minification 85.4 kB
After compression 84.0 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. Eere.energy.gov has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 57 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Eere 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 25 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.