3.1 sec in total
9 ms
1.6 sec
1.4 sec
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Visit tr.coursera.orgWe analyzed Tr.coursera.org page load time and found that the first response time was 9 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
tr.coursera.org performance score
name
value
score
weighting
Value2.7 s
61/100
10%
Value4.4 s
39/100
25%
Value11.6 s
5/100
10%
Value6,100 ms
0/100
30%
Value0.044
99/100
15%
Value27.0 s
0/100
10%
9 ms
1094 ms
78 ms
166 ms
224 ms
Our browser made a total of 83 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Tr.coursera.org, 96% (80 requests) were made to D3njjcbhbojbot.cloudfront.net and 1% (1 request) were made to Coursera.org. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source Coursera.org.
Page size can be reduced by 1.0 MB (43%)
2.4 MB
1.3 MB
In fact, the total size of Tr.coursera.org main page is 2.4 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. 50% of websites need less resources to load. HTML takes 1.2 MB which makes up the majority of the site volume.
Potential reduce by 1.0 MB
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 1.0 MB or 84% of the original size.
Potential reduce by 695 B
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. Tr Coursera images are well optimized though.
Potential reduce by 2.7 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.
Potential reduce by 144 B
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. Tr.coursera.org has all CSS files already compressed.
Number of requests can be reduced by 21 (28%)
74
53
The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tr Coursera. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
tr.coursera.org
9 ms
www.coursera.org
1094 ms
allStyles.036607de29fb40504a66.css
78 ms
allStyles.036607de29fb40504a66.js
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en.app.55a7d4576447327d7a83.js
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tr.coursera.org accessibility score
tr.coursera.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
Issues were logged in the Issues panel in Chrome Devtools
tr.coursera.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
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 Tr.coursera.org 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 Tr.coursera.org 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.
tr.coursera.org
Open Graph data is detected on the main page of Tr Coursera. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: