6.3 sec in total
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5.9 sec
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Visit x.cs50.net now to see the best up-to-date X CS50 content for United States and also check out these interesting facts you probably never knew about x.cs50.net
CS50 is a free online class introducing students to the basics of computer science. CS50 is taught by David Malan of Harvard University.
Visit x.cs50.netWe analyzed X.cs50.net page load time and found that the first response time was 30 ms and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
x.cs50.net performance score
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Our browser made a total of 66 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original X.cs50.net, 47% (31 requests) were made to Edx.org and 9% (6 requests) were made to D37djvu3ytnwxt.cloudfront.net. The less responsive or slowest element that took the longest time to load (4.4 sec) relates to the external source S7.addthis.com.
Page size can be reduced by 1.4 MB (71%)
1.9 MB
559.6 kB
In fact, the total size of X.cs50.net main page is 1.9 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. Javascripts take 1.4 MB which makes up the majority of the site volume.
Potential reduce by 68.5 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 68.5 kB or 72% of the original size.
Potential reduce by 7.8 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. X CS50 images are well optimized though.
Potential reduce by 1.0 MB
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 1.0 MB or 73% of the original size.
Potential reduce by 297.2 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. X.cs50.net needs all CSS files to be minified and compressed as it can save up to 297.2 kB or 83% of the original size.
Number of requests can be reduced by 24 (40%)
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The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of X CS50. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
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x.cs50.net SEO score
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise X.cs50.net 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 X.cs50.net 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.
x.cs50.net
Open Graph data is detected on the main page of X CS50. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: