Report Summary

  • 0

    Performance

  • 0

    Accessibility

  • 0

    Best Practices

  • 0

    SEO

blackboard.cos.edu

Blackboard Learn

Page Load Speed

2 sec in total

First Response

162 ms

Resources Loaded

1.7 sec

Page Rendered

174 ms

blackboard.cos.edu screenshot

About Website

Welcome to blackboard.cos.edu homepage info - get ready to check Blackboard Cos best content for United States right away, or after learning these important things about blackboard.cos.edu

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Key Findings

We analyzed Blackboard.cos.edu page load time and found that the first response time was 162 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

blackboard.cos.edu performance score

0

Network Requests Diagram

162 ms

shared.css

23 ms

theme.css

105 ms

colorpalette.css

55 ms

i18n.js

87 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 81% of them (25 requests) were addressed to the original Blackboard.cos.edu, 13% (4 requests) were made to Cos.edu and 3% (1 request) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (901 ms) relates to the external source Cos.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 863.1 kB (70%)

Content Size

1.2 MB

After Optimization

371.9 kB

In fact, the total size of Blackboard.cos.edu main page is 1.2 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. 25% of websites need less resources to load. Javascripts take 555.5 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 33.0 kB

  • Original 42.7 kB
  • After minification 41.9 kB
  • After compression 9.7 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 33.0 kB or 77% of the original size.

Image Optimization

-25%

Potential reduce by 63.9 kB

  • Original 259.2 kB
  • After minification 195.3 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, Blackboard Cos needs image optimization as it can save up to 63.9 kB or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-83%

Potential reduce by 460.7 kB

  • Original 555.5 kB
  • After minification 363.8 kB
  • After compression 94.8 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 460.7 kB or 83% of the original size.

CSS Optimization

-81%

Potential reduce by 305.4 kB

  • Original 377.5 kB
  • After minification 349.9 kB
  • After compression 72.1 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. Blackboard.cos.edu needs all CSS files to be minified and compressed as it can save up to 305.4 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (46%)

Requests Now

28

After Optimization

15

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blackboard Cos. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

SEO Factors

blackboard.cos.edu SEO score

0

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blackboard.cos.edu 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 Blackboard.cos.edu 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 Blackboard Cos. 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: