Tools & Wizards About Us
devmanuals.com screenshot

Report Summary

  • 56

    Performance

    Renders faster than
    72% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

devmanuals.com

DevManuals.com, Programming tutorials, Java, JSP, HTML, Servlets, CSS, XML, DHTML, Ajax, jQuery

Page Load Speed

2.4 sec in total

First Response

94 ms

Resources Loaded

2.2 sec

Page Rendered

129 ms

devmanuals.com screenshot

About Website

Click here to check amazing Dev Manuals content for India. Otherwise, check out these important facts you probably never knew about devmanuals.com

DevManuals.com is technical resource on HTML, DHTML, CSS, Java, JSP, Servlets, Ajax, jQuery and many other technologies.

Visit devmanuals.com

Key Findings

We analyzed Devmanuals.com page load time and found that the first response time was 94 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

devmanuals.com performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.9 s

87/100

10%

LCP (Largest Contentful Paint)

Value3.2 s

74/100

25%

SI (Speed Index)

Value3.8 s

83/100

10%

TBT (Total Blocking Time)

Value1,330 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.108

88/100

15%

TTI (Time to Interactive)

Value9.9 s

27/100

10%

Network Requests Diagram

devmanuals.com

94 ms

devmanuals.com

445 ms

bootstrap.min.css

88 ms

style.css

86 ms

plusone.js

32 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 37% of them (17 requests) were addressed to the original Devmanuals.com, 13% (6 requests) were made to Apis.google.com and 9% (4 requests) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Devmanuals.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 663.0 kB (43%)

Content Size

1.5 MB

After Optimization

877.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Devmanuals.com main page is 1.5 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. 65% of websites need less resources to load. Javascripts take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 32.9 kB

  • Original 43.1 kB
  • After minification 41.3 kB
  • After compression 10.2 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 32.9 kB or 76% of the original size.

Image Optimization

-2%

Potential reduce by 4.5 kB

  • Original 219.3 kB
  • After minification 214.8 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. Dev Manuals images are well optimized though.

JavaScript Optimization

-45%

Potential reduce by 517.3 kB

  • Original 1.1 MB
  • After minification 1.1 MB
  • After compression 631.2 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 517.3 kB or 45% of the original size.

CSS Optimization

-84%

Potential reduce by 108.4 kB

  • Original 129.7 kB
  • After minification 127.2 kB
  • After compression 21.3 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. Devmanuals.com needs all CSS files to be minified and compressed as it can save up to 108.4 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (45%)

Requests Now

40

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dev Manuals. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

devmanuals.com

devmanuals.com

94 ms

devmanuals.com

devmanuals.com

445 ms

bootstrap.min.css

bootstrap.min.css

88 ms

style.css

style.css

86 ms

plusone.js

plusone.js

32 ms

widgets.js

widgets.js

49 ms

in.js

in.js

23 ms

adsbygoogle.js

adsbygoogle.js

166 ms

jquery.min.js

jquery.min.js

33 ms

bootstrap.min.js

bootstrap.min.js

224 ms

analytics.js

analytics.js

135 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

125 ms

all.js

all.js

165 ms

logo.png

logo.png

100 ms

logo.png

logo.png

101 ms

banner.jpg

banner.jpg

207 ms

37236What-is-HBase.jpg

37236What-is-HBase.jpg

207 ms

37235What-do-you-understand-by-Big-Data.jpg

37235What-do-you-understand-by-Big-Data.jpg

164 ms

37230hbase-create-table-example.jpg

37230hbase-create-table-example.jpg

338 ms

37228Hadoop-and-Big-Data-Tutorial-for-Beginners.jpg

37228Hadoop-and-Big-Data-Tutorial-for-Beginners.jpg

339 ms

2070install-Oracle-Virtual-box.jpg

2070install-Oracle-Virtual-box.jpg

1232 ms

orangebg.png

orangebg.png

1200 ms

orangebullet.png

orangebullet.png

1211 ms

footerbg.png

footerbg.png

1211 ms

show_ads_impl.js

show_ads_impl.js

395 ms

jquery.validate.js

jquery.validate.js

44 ms

additional-methods.js

additional-methods.js

47 ms

collect

collect

35 ms

pagenoutfound.html

pagenoutfound.html

1357 ms

all.js

all.js

30 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

188 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

11 ms

fastbutton

fastbutton

36 ms

js

js

97 ms

postmessageRelay

postmessageRelay

44 ms

3604799710-postmessagerelay.js

3604799710-postmessagerelay.js

100 ms

rpc:shindig_random.js

rpc:shindig_random.js

11 ms

developers.google.com

developers.google.com

396 ms

settings

settings

103 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

11 ms

button.856debeac157d9669cf51e73a08fbc93.js

button.856debeac157d9669cf51e73a08fbc93.js

18 ms

embeds

embeds

49 ms

tweet_button.2f70fb173b9000da126c79afe2098f02.en.html

tweet_button.2f70fb173b9000da126c79afe2098f02.en.html

47 ms

zrt_lookup.html

zrt_lookup.html

38 ms

ads

ads

91 ms

ads

ads

76 ms

Accessibility Review

devmanuals.com accessibility score

85

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

devmanuals.com best practices score

58

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

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

devmanuals.com SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

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 Devmanuals.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 Devmanuals.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

devmanuals.com

Open Graph description is not detected on the main page of Dev Manuals. 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: