Report Summary

  • 0

    Performance

  • 0

    Accessibility

  • 0

    Best Practices

  • 0

    SEO

flu.gov

Influenza (Flu) | CDC

Page Load Speed

1 sec in total

First Response

31 ms

Resources Loaded

804 ms

Page Rendered

194 ms

flu.gov screenshot

About Website

Click here to check amazing Flu content for United States. Otherwise, check out these important facts you probably never knew about flu.gov

Everything you need to know about the flu illness, including symptoms, treatment and prevention.

Visit flu.gov

Key Findings

We analyzed Flu.gov page load time and found that the first response time was 31 ms and then it took 998 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

flu.gov performance score

0

Network Requests Diagram

www.flu.gov

31 ms

flu-style.css

11 ms

prism.css

8 ms

jquery.js

32 ms

cookie.js

7 ms

Our browser made a total of 99 requests to load all elements on the main page. We found that 57% of them (56 requests) were addressed to the original Flu.gov, 6% (6 requests) were made to Google-analytics.com and 5% (5 requests) were made to Hhsflu.mpeasylink.com. The less responsive or slowest element that took the longest time to load (241 ms) relates to the external source Wcdapps.hhs.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 761.4 kB (54%)

Content Size

1.4 MB

After Optimization

657.6 kB

In fact, the total size of Flu.gov main page is 1.4 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. 60% of websites need less resources to load. Javascripts take 644.8 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 25.5 kB

  • Original 33.0 kB
  • After minification 28.9 kB
  • After compression 7.6 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. This page needs HTML code to be minified as it can gain 4.2 kB, which is 13% 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 25.5 kB or 77% of the original size.

Image Optimization

-7%

Potential reduce by 29.4 kB

  • Original 450.2 kB
  • After minification 420.8 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. Flu images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 467.8 kB

  • Original 644.8 kB
  • After minification 479.0 kB
  • After compression 177.0 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 467.8 kB or 73% of the original size.

CSS Optimization

-82%

Potential reduce by 238.7 kB

  • Original 291.0 kB
  • After minification 278.9 kB
  • After compression 52.2 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. Flu.gov needs all CSS files to be minified and compressed as it can save up to 238.7 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 64 (70%)

Requests Now

92

After Optimization

28

The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Flu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 30 to 1 for JavaScripts and from 19 to 1 for CSS and as a result speed up the page load time.

SEO Factors

flu.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 Flu.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 Flu.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

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