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w3lectures.com screenshot

Report Summary

  • 36

    Performance

    Renders faster than
    56% of other websites

  • 57

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

w3lectures.com

w3Lectures.com

Page Load Speed

4.9 sec in total

First Response

100 ms

Resources Loaded

4 sec

Page Rendered

805 ms

w3lectures.com screenshot

About Website

Visit w3lectures.com now to see the best up-to-date W3Lectures content and also check out these interesting facts you probably never knew about w3lectures.com

w3Lectures is an educational website. HTML, CSS, JavaScript, Angular, PHP, C#, ASP.NET Core, MySQL, SQL Server, Oracle, MS Office and Books.

Visit w3lectures.com

Key Findings

We analyzed W3lectures.com page load time and found that the first response time was 100 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

w3lectures.com performance score

36

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

49/100

10%

LCP (Largest Contentful Paint)

Value12.8 s

0/100

25%

SI (Speed Index)

Value5.7 s

51/100

10%

TBT (Total Blocking Time)

Value920 ms

31/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value12.6 s

14/100

10%

Network Requests Diagram

www.w3lectures.com

100 ms

www.w3lectures.com

450 ms

14020288-widget_css_bundle.css

122 ms

jquery.min.js

129 ms

apu.php

870 ms

Our browser made a total of 197 requests to load all elements on the main page. We found that 3% of them (5 requests) were addressed to the original W3lectures.com, 22% (44 requests) were made to 1.bp.blogspot.com and 19% (38 requests) were made to Static.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source 1.bp.blogspot.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 613.9 kB (29%)

Content Size

2.1 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of W3lectures.com main page is 2.1 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. Only a small number of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 304.7 kB

  • Original 362.0 kB
  • After minification 360.4 kB
  • After compression 57.4 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 304.7 kB or 84% of the original size.

Image Optimization

-1%

Potential reduce by 9.6 kB

  • Original 1.2 MB
  • After minification 1.2 MB

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. W3Lectures images are well optimized though.

JavaScript Optimization

-50%

Potential reduce by 266.3 kB

  • Original 528.8 kB
  • After minification 528.3 kB
  • After compression 262.6 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 266.3 kB or 50% of the original size.

CSS Optimization

-67%

Potential reduce by 33.3 kB

  • Original 49.8 kB
  • After minification 49.7 kB
  • After compression 16.4 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. W3lectures.com needs all CSS files to be minified and compressed as it can save up to 33.3 kB or 67% of the original size.

Requests Breakdown

Number of requests can be reduced by 77 (46%)

Requests Now

167

After Optimization

90

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 167 CSS, Javascripts, AJAX and image requests in order to completely render the main page of W3Lectures. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 55 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.w3lectures.com

www.w3lectures.com

100 ms

www.w3lectures.com

www.w3lectures.com

450 ms

14020288-widget_css_bundle.css

14020288-widget_css_bundle.css

122 ms

jquery.min.js

jquery.min.js

129 ms

apu.php

apu.php

870 ms

css

css

116 ms

font-awesome.min.css

font-awesome.min.css

127 ms

js

js

305 ms

dmedianet.js

dmedianet.js

754 ms

element.js

element.js

301 ms

platform.js

platform.js

301 ms

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607 ms

2095732370-widgets.js

2095732370-widgets.js

280 ms

bundle.js

bundle.js

677 ms

the_city1.jpg

the_city1.jpg

747 ms

xfbml.customerchat.js

xfbml.customerchat.js

591 ms

team-social-icons.png

team-social-icons.png

591 ms

summary

summary

330 ms

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sprite1.png

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JS.jpg

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ui-select.png

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459 ms

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727 ms

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860 ms

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Optimize%2Bangular%2Bbundle%2Bsize%2Band%2Bdecrease%2Bfirst%2Btime%2Bpages%2Bloading%2Btime.jpg

723 ms

get-numeric-value-from-string-in-sql.jpg

get-numeric-value-from-string-in-sql.jpg

723 ms

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756 ms

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fontawesome-webfont.woff

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Optimize%2Bangular%2Bbundle%2Bsize%2Band%2Bdecrease%2Bfirst%2Btime%2Bpages%2Bloading%2Btime.jpg

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1202 ms

Bundle%2BSize.png

Bundle%2BSize.png

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get-numeric-value-from-string-in-sql.jpg

get-numeric-value-from-string-in-sql.jpg

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authorization.css

authorization.css

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calculate-holidays-or-days-between-two-dates.jpg

calculate-holidays-or-days-between-two-dates.jpg

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calculate-holidays-or-days-between-two-dates2.png

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analytics.js

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386 ms

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270 ms

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1 ms

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88 ms

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210 ms

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translateelement.css

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54 ms

main.js

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399 ms

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customerchat.php

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Accessibility Review

w3lectures.com accessibility score

57

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.

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

<frame> or <iframe> elements do not have a title

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

w3lectures.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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

w3lectures.com SEO score

91

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

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 W3lectures.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 W3lectures.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

w3lectures.com

Open Graph data is detected on the main page of W3Lectures. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: