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virtualnerd.com screenshot

Report Summary

  • 87

    Performance

    Renders faster than
    89% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 49% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

virtualnerd.com

Virtual Nerd: Real math help for school and home

Page Load Speed

379 ms in total

First Response

19 ms

Resources Loaded

221 ms

Page Rendered

139 ms

virtualnerd.com screenshot

About Website

Visit virtualnerd.com now to see the best up-to-date Virtual Nerd content for United States and also check out these interesting facts you probably never knew about virtualnerd.com

Virtual Nerd's patent-pending tutorial system provides in-context information, hints, and links to supporting tutorials, synchronized with videos, each 3 to 7 minutes long. In this non-linear system, ...

Visit virtualnerd.com

Key Findings

We analyzed Virtualnerd.com page load time and found that the first response time was 19 ms and then it took 360 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

virtualnerd.com performance score

87

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

86/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

87/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value320 ms

76/100

30%

CLS (Cumulative Layout Shift)

Value0.015

100/100

15%

TTI (Time to Interactive)

Value3.5 s

92/100

10%

Network Requests Diagram

virtualnerd.com

19 ms

www.virtualnerd.com

26 ms

bootstrap-2.2.2.min.css

13 ms

font-awesome-3.2.1.min.css

24 ms

vn_public.css

22 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 87% of them (20 requests) were addressed to the original Virtualnerd.com, 9% (2 requests) were made to Google-analytics.com and 4% (1 request) were made to Js-agent.newrelic.com. The less responsive or slowest element that took the longest time to load (52 ms) belongs to the original domain Virtualnerd.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 273.7 kB (60%)

Content Size

458.0 kB

After Optimization

184.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Virtualnerd.com main page is 458.0 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. 35% of websites need less resources to load. Javascripts take 228.1 kB which makes up the majority of the site volume.

HTML Optimization

-67%

Potential reduce by 8.4 kB

  • Original 12.5 kB
  • After minification 11.5 kB
  • After compression 4.1 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 8.4 kB or 67% of the original size.

Image Optimization

-2%

Potential reduce by 1.1 kB

  • Original 60.6 kB
  • After minification 59.5 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. Virtual Nerd images are well optimized though.

JavaScript Optimization

-59%

Potential reduce by 135.3 kB

  • Original 228.1 kB
  • After minification 224.1 kB
  • After compression 92.8 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 135.3 kB or 59% of the original size.

CSS Optimization

-82%

Potential reduce by 128.9 kB

  • Original 156.8 kB
  • After minification 154.1 kB
  • After compression 27.9 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. Virtualnerd.com needs all CSS files to be minified and compressed as it can save up to 128.9 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (56%)

Requests Now

18

After Optimization

8

  • Images
  • JavaScript
  • CSS

The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Virtual Nerd. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

virtualnerd.com

virtualnerd.com

19 ms

www.virtualnerd.com

www.virtualnerd.com

26 ms

bootstrap-2.2.2.min.css

bootstrap-2.2.2.min.css

13 ms

font-awesome-3.2.1.min.css

font-awesome-3.2.1.min.css

24 ms

vn_public.css

vn_public.css

22 ms

jquery-1.7.2.min.js

jquery-1.7.2.min.js

27 ms

bootstrap-2.2.2.min.js

bootstrap-2.2.2.min.js

44 ms

underscore-1.4.3.min.js

underscore-1.4.3.min.js

48 ms

vn-main.js

vn-main.js

52 ms

bootstrap-responsive-2.2.2.min.css

bootstrap-responsive-2.2.2.min.css

47 ms

jwplayer.js

jwplayer.js

50 ms

plugins.js

plugins.js

50 ms

ga.js

ga.js

31 ms

swatch-vn_gradient_stripes-64x64.png

swatch-vn_gradient_stripes-64x64.png

26 ms

logo-slim.png

logo-slim.png

25 ms

tutor-whiteboard-blank.jpg

tutor-whiteboard-blank.jpg

29 ms

pearson-tagline-orange.png

pearson-tagline-orange.png

26 ms

pearson-logo-orange.png

pearson-logo-orange.png

27 ms

aller_bd-webfont.woff

aller_bd-webfont.woff

27 ms

aller_lt-webfont.woff

aller_lt-webfont.woff

29 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

28 ms

__utm.gif

__utm.gif

24 ms

nr-852.min.js

nr-852.min.js

42 ms

Accessibility Review

virtualnerd.com accessibility score

80

Accessibility Issues

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

Buttons do not have an accessible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Best Practices

virtualnerd.com best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

virtualnerd.com SEO score

100

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Virtualnerd.com 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 Virtualnerd.com main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

virtualnerd.com

Open Graph description is not detected on the main page of Virtual Nerd. 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: