Tools & Wizards About Us

Report Summary

  • 13

    Performance

    Renders faster than
    25% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

mastery.com

Mastery Training Services - Online Training, Courses and Webinars

Page Load Speed

4.1 sec in total

First Response

26 ms

Resources Loaded

3.9 sec

Page Rendered

203 ms

About Website

Click here to check amazing Mastery content for United States. Otherwise, check out these important facts you probably never knew about mastery.com

Build an amazing organization with Mastery Training Services' wide selection of online training and courses. Call us at 1-800-258-3837 or contact us online.

Visit mastery.com

Key Findings

We analyzed Mastery.com page load time and found that the first response time was 26 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

mastery.com performance score

13

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value11.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value25.4 s

0/100

25%

SI (Speed Index)

Value19.9 s

0/100

10%

TBT (Total Blocking Time)

Value24,750 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.114

86/100

15%

TTI (Time to Interactive)

Value42.1 s

0/100

10%

Network Requests Diagram

mastery.com

26 ms

www.mastery.com

181 ms

fontello.css

31 ms

foundation.css

122 ms

app.css

53 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that 53% of them (27 requests) were addressed to the original Mastery.com, 6% (3 requests) were made to Google-analytics.com and 4% (2 requests) were made to Staticxx.facebook.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Crm.zoho.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 573.7 kB (58%)

Content Size

996.8 kB

After Optimization

423.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Mastery.com main page is 996.8 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. 45% of websites need less resources to load. Javascripts take 470.0 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 25.8 kB

  • Original 35.8 kB
  • After minification 33.1 kB
  • After compression 10.0 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 25.8 kB or 72% of the original size.

Image Optimization

-10%

Potential reduce by 21.5 kB

  • Original 214.8 kB
  • After minification 193.3 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. Mastery images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 292.3 kB

  • Original 470.0 kB
  • After minification 467.7 kB
  • After compression 177.7 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 292.3 kB or 62% of the original size.

CSS Optimization

-85%

Potential reduce by 234.1 kB

  • Original 276.2 kB
  • After minification 225.2 kB
  • After compression 42.1 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. Mastery.com needs all CSS files to be minified and compressed as it can save up to 234.1 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (49%)

Requests Now

47

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 47 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mastery. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

mastery.com accessibility score

84

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

mastery.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

mastery.com SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Mastery.com 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 Mastery.com 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 Mastery. 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: