879 ms in total
172 ms
570 ms
137 ms
Click here to check amazing WONDER CDC content for United States. Otherwise, check out these important facts you probably never knew about wonder.cdc.gov
CDC WONDER is a system for disseminating Public Health data and information
Visit wonder.cdc.govWe analyzed Wonder.cdc.gov page load time and found that the first response time was 172 ms and then it took 707 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.
wonder.cdc.gov performance score
name
value
score
weighting
Value3.7 s
29/100
10%
Value4.2 s
44/100
25%
Value3.7 s
85/100
10%
Value250 ms
84/100
30%
Value0.017
100/100
15%
Value5.1 s
76/100
10%
172 ms
128 ms
159 ms
70 ms
36 ms
Our browser made a total of 35 requests to load all elements on the main page. We found that all of those requests were addressed to Wonder.cdc.gov and no external sources were called. The less responsive or slowest element that took the longest time to load (175 ms) belongs to the original domain Wonder.cdc.gov.
Page size can be reduced by 633.9 kB (70%)
910.4 kB
276.5 kB
In fact, the total size of Wonder.cdc.gov main page is 910.4 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. 35% of websites need less resources to load. CSS take 429.1 kB which makes up the majority of the site volume.
Potential reduce by 29.1 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. This page needs HTML code to be minified as it can gain 6.1 kB, which is 17% 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 29.1 kB or 80% of the original size.
Potential reduce by 19.2 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, WONDER CDC needs image optimization as it can save up to 19.2 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 221.6 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 221.6 kB or 69% of the original size.
Potential reduce by 364.1 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. Wonder.cdc.gov needs all CSS files to be minified and compressed as it can save up to 364.1 kB or 85% of the original size.
Number of requests can be reduced by 17 (53%)
32
15
The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of WONDER CDC. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.
wonder.cdc.gov
172 ms
bootstrap24.css
128 ms
app.css
159 ms
modernizr-latest.js
70 ms
local.css
36 ms
wonder_general_tp.css
63 ms
rr_general.css
54 ms
rr_finder2.css
69 ms
rr_results.css
75 ms
wonder.js
100 ms
finder.js
105 ms
accordion.js
85 ms
welcome.css
91 ms
libs.min.js
175 ms
core.min.js
79 ms
app.min.js
117 ms
masthead_subpage.svg
140 ms
masthead_1-col.svg
130 ms
su.png
129 ms
smRecommend.png
137 ms
smTweet.png
138 ms
sm-plus.gif
136 ms
HeadingEmpty.gif
143 ms
tri-right.gif
141 ms
ss.png
142 ms
sm.png
140 ms
lato-regular-webfont.woff
140 ms
fontawesome-webfont.woff
74 ms
socialmenu.js
46 ms
socialmenu.css
45 ms
sf.png
32 ms
facebook-32.png
25 ms
twitter-32.png
20 ms
print.css
18 ms
print.css
18 ms
wonder.cdc.gov accessibility score
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
Buttons do not have an accessible name
Form elements do not have associated labels
wonder.cdc.gov best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Registers an unload listener
Detected JavaScript libraries
Page has valid source maps
wonder.cdc.gov SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Wonder.cdc.gov can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Wonder.cdc.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.
wonder.cdc.gov
Open Graph description is not detected on the main page of WONDER CDC. 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: