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Report Summary

  • 0

    Performance

  • 0

    Accessibility

  • 0

    Best Practices

  • 0

    SEO

vault.cs50.net

CS50 Vault

Page Load Speed

541 ms in total

First Response

11 ms

Resources Loaded

417 ms

Page Rendered

113 ms

vault.cs50.net screenshot

About Website

Welcome to vault.cs50.net homepage info - get ready to check Vault CS50 best content for United States right away, or after learning these important things about vault.cs50.net

Visit vault.cs50.net

Key Findings

We analyzed Vault.cs50.net page load time and found that the first response time was 11 ms and then it took 530 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

vault.cs50.net performance score

0

Network Requests Diagram

vault.cs50.net

11 ms

vault.cs50.net

43 ms

jquery.js

145 ms

bootstrap.js

69 ms

jquery-ui-1.9.2.custom.js

179 ms

Our browser made a total of 11 requests to load all elements on the main page. We found that all of those requests were addressed to Vault.cs50.net and no external sources were called. The less responsive or slowest element that took the longest time to load (179 ms) belongs to the original domain Vault.cs50.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (58%)

Content Size

1.7 MB

After Optimization

737.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vault.cs50.net main page is 1.7 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. 15% of websites need less resources to load. Javascripts take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-62%

Potential reduce by 966 B

  • Original 1.5 kB
  • After minification 1.3 kB
  • After compression 582 B

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 222 B, which is 14% 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 966 B or 62% of the original size.

Image Optimization

-5%

Potential reduce by 29.3 kB

  • Original 543.9 kB
  • After minification 514.7 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. Vault CS50 images are well optimized though.

JavaScript Optimization

-81%

Potential reduce by 840.5 kB

  • Original 1.0 MB
  • After minification 749.6 kB
  • After compression 199.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 840.5 kB or 81% of the original size.

CSS Optimization

-86%

Potential reduce by 137.9 kB

  • Original 160.6 kB
  • After minification 133.7 kB
  • After compression 22.7 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. Vault.cs50.net needs all CSS files to be minified and compressed as it can save up to 137.9 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (44%)

Requests Now

9

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vault 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 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

vault.cs50.net

vault.cs50.net

11 ms

vault.cs50.net

vault.cs50.net

43 ms

jquery.js

jquery.js

145 ms

bootstrap.js

bootstrap.js

69 ms

jquery-ui-1.9.2.custom.js

jquery-ui-1.9.2.custom.js

179 ms

jQueryRotate.2.2.js

jQueryRotate.2.2.js

49 ms

cs50.video.min.js

cs50.video.min.js

174 ms

jquery-ui-1.9.2.custom.css

jquery-ui-1.9.2.custom.css

28 ms

bootstrap.css

bootstrap.css

172 ms

styles.css

styles.css

84 ms

lockFull50.png

lockFull50.png

131 ms

SEO Factors

vault.cs50.net 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 Vault.cs50.net 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 Vault.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.

Social Sharing Optimization

vault.cs50.net

Open Graph description is not detected on the main page of Vault CS50. 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: