Tools & Wizards About Us
freecomputerbooks.com screenshot

Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 80

    SEO

    Google-friendlier than
    42% of websites

freecomputerbooks.com

Free Computer, Programming, Mathematics, Technical Books, Lecture Notes and Tutorials

Page Load Speed

3.7 sec in total

First Response

107 ms

Resources Loaded

3.2 sec

Page Rendered

324 ms

freecomputerbooks.com screenshot

About Website

Click here to check amazing Free Computer Books content for India. Otherwise, check out these important facts you probably never knew about freecomputerbooks.com

Links to Free Programming, Computer, Mathematics, Technical eBooks and Lecture Notes all over the World, Directory of online free programming, computer, engineering, mathematics, technical books, eboo...

Visit freecomputerbooks.com

Key Findings

We analyzed Freecomputerbooks.com page load time and found that the first response time was 107 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

freecomputerbooks.com performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

55/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

48/100

25%

SI (Speed Index)

Value6.7 s

37/100

10%

TBT (Total Blocking Time)

Value1,160 ms

22/100

30%

CLS (Cumulative Layout Shift)

Value0.344

32/100

15%

TTI (Time to Interactive)

Value14.3 s

9/100

10%

Network Requests Diagram

freecomputerbooks.com

107 ms

freecomputerbooks.com

196 ms

layout.css

90 ms

jquery-1.12.4.js

29 ms

common.js

114 ms

Our browser made a total of 120 requests to load all elements on the main page. We found that 25% of them (30 requests) were addressed to the original Freecomputerbooks.com, 13% (15 requests) were made to Googleads.g.doubleclick.net and 11% (13 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (759 ms) relates to the external source Googleads.g.doubleclick.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 95.5 kB (11%)

Content Size

890.9 kB

After Optimization

795.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Freecomputerbooks.com main page is 890.9 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 657.8 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 49.2 kB

  • Original 62.5 kB
  • After minification 58.2 kB
  • After compression 13.3 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 49.2 kB or 79% of the original size.

Image Optimization

-7%

Potential reduce by 10.1 kB

  • Original 143.2 kB
  • After minification 133.0 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. Free Computer Books images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 12.2 kB

  • Original 657.8 kB
  • After minification 652.9 kB
  • After compression 645.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-87%

Potential reduce by 24.0 kB

  • Original 27.4 kB
  • After minification 17.2 kB
  • After compression 3.5 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. Freecomputerbooks.com needs all CSS files to be minified and compressed as it can save up to 24.0 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 70 (64%)

Requests Now

110

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 110 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Free Computer Books. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 39 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

freecomputerbooks.com

freecomputerbooks.com

107 ms

freecomputerbooks.com

freecomputerbooks.com

196 ms

layout.css

layout.css

90 ms

jquery-1.12.4.js

jquery-1.12.4.js

29 ms

common.js

common.js

114 ms

main.js

main.js

114 ms

nmedianet.js

nmedianet.js

144 ms

adsbygoogle.js

adsbygoogle.js

231 ms

564 ms

buttons.js

buttons.js

29 ms

year.js

year.js

82 ms

js

js

74 ms

bw_bg2.jpg

bw_bg2.jpg

122 ms

header_bg.jpg

header_bg.jpg

124 ms

await.gif

await.gif

120 ms

search.png

search.png

122 ms

new2.gif

new2.gif

124 ms

The-Linux-Programming-Interface_43x55.jpg

The-Linux-Programming-Interface_43x55.jpg

237 ms

Embedded-C-Coding-Standard_43x55.jpg

Embedded-C-Coding-Standard_43x55.jpg

245 ms

Using-R-with-Multivariate-Statistics_43x55.jpg

Using-R-with-Multivariate-Statistics_43x55.jpg

244 ms

Information-Theory-for-Data-Science_43x55.jpg

Information-Theory-for-Data-Science_43x55.jpg

244 ms

Exercises-and-Problems-in-Linear-Algebra_43x55.jpg

Exercises-and-Problems-in-Linear-Algebra_43x55.jpg

245 ms

Mathematics-for-Game-Developers_43x55.jpg

Mathematics-for-Game-Developers_43x55.jpg

276 ms

Essentials-of-Compilation-An-Incremental-Approach-in-Python_43x55.jpg

Essentials-of-Compilation-An-Incremental-Approach-in-Python_43x55.jpg

274 ms

Using-Python-for-Introductory-Econometrics_43x55.jpg

Using-Python-for-Introductory-Econometrics_43x55.jpg

277 ms

FortiGate-Firewall_43x55.jpg

FortiGate-Firewall_43x55.jpg

278 ms

right_arrow_icon.gif

right_arrow_icon.gif

274 ms

arrowbullet.png

arrowbullet.png

274 ms

new2.gif

new2.gif

306 ms

blue_bullet.gif

blue_bullet.gif

307 ms

follow_me_on_twitter.png

follow_me_on_twitter.png

307 ms

expand.gif

expand.gif

308 ms

cool.gif

cool.gif

308 ms

bping.php

bping.php

216 ms

SAFEFRAME.html

SAFEFRAME.html

578 ms

videoAds.js

videoAds.js

199 ms

SAFEFRAME.html

SAFEFRAME.html

361 ms

bping.php

bping.php

174 ms

RoundedGlow728x90.png

RoundedGlow728x90.png

192 ms

titlebg.jpg

titlebg.jpg

231 ms

green_bullet.gif

green_bullet.gif

224 ms

show_ads_impl.js

show_ads_impl.js

473 ms

bql.php

bql.php

37 ms

w_cato80c4.gif

w_cato80c4.gif

178 ms

w_sofg3880c4.gif

w_sofg3880c4.gif

292 ms

101 ms

SAFEFRAME.html

SAFEFRAME.html

268 ms

bping.php

bping.php

32 ms

SAFEFRAME.html

SAFEFRAME.html

76 ms

bping.php

bping.php

15 ms

js

js

70 ms

analytics.js

analytics.js

207 ms

bql.php

bql.php

188 ms

bql.php

bql.php

147 ms

zrt_lookup.html

zrt_lookup.html

56 ms

ads

ads

759 ms

Roboto-Bold.woff

Roboto-Bold.woff

35 ms

ads

ads

538 ms

collect

collect

39 ms

bql.php

bql.php

32 ms

ads

ads

376 ms

ads

ads

481 ms

collect

collect

29 ms

gen_204

gen_204

82 ms

pixel

pixel

69 ms

dv3.js

dv3.js

90 ms

adj

adj

35 ms

window_focus.js

window_focus.js

26 ms

qs_click_protection.js

qs_click_protection.js

30 ms

ufs_web_display.js

ufs_web_display.js

29 ms

pixel

pixel

270 ms

pixel

pixel

353 ms

ad

ad

52 ms

pixel

pixel

221 ms

ad

ad

218 ms

gen_204

gen_204

303 ms

adj

adj

218 ms

reactive_library.js

reactive_library.js

473 ms

ca-pub-5976068913745703

ca-pub-5976068913745703

465 ms

Q12zgMmT.js

Q12zgMmT.js

265 ms

pixel

pixel

168 ms

ad

ad

179 ms

adj

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163 ms

rum

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177 ms

gen_204

gen_204

353 ms

setuid

setuid

161 ms

pixel

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159 ms

62bHydCX.html

62bHydCX.html

70 ms

pixel

pixel

195 ms

pixel

pixel

193 ms

218 ms

activeview

activeview

178 ms

rum

rum

48 ms

activeview

activeview

93 ms

activeview

activeview

126 ms

WGg91BhL6Bhk3qTAPqmblqNZdzujbVjDoJfr3h8Q3EY.js

WGg91BhL6Bhk3qTAPqmblqNZdzujbVjDoJfr3h8Q3EY.js

33 ms

ads

ads

674 ms

27c0e1a3519c9354d4bc0ec1b5da6b54.js

27c0e1a3519c9354d4bc0ec1b5da6b54.js

175 ms

3b0c1a1c8750041eb27603629860e89a.js

3b0c1a1c8750041eb27603629860e89a.js

338 ms

load_preloaded_resource.js

load_preloaded_resource.js

32 ms

cdf01d8369ba0e15ccbc9395c59a9391.js

cdf01d8369ba0e15ccbc9395c59a9391.js

355 ms

abg_lite.js

abg_lite.js

81 ms

bbcd6bf18c20baa1b2adeb195de9b551.js

bbcd6bf18c20baa1b2adeb195de9b551.js

355 ms

fullscreen_api_adapter.js

fullscreen_api_adapter.js

154 ms

interstitial_ad_frame.js

interstitial_ad_frame.js

159 ms

pixel

pixel

163 ms

ad

ad

146 ms

adj

adj

153 ms

gen_204

gen_204

148 ms

feedback_grey600_24dp.png

feedback_grey600_24dp.png

327 ms

settings_grey600_24dp.png

settings_grey600_24dp.png

327 ms

pixel

pixel

186 ms

pixel

pixel

185 ms

icon.png

icon.png

286 ms

um

um

282 ms

15624432747587855140

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241 ms

pixel

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110 ms

css

css

138 ms

sd

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116 ms

pixel

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62 ms

Accessibility Review

freecomputerbooks.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.

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

freecomputerbooks.com best practices score

50

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

Displays images with incorrect aspect ratio

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

SEO Factors

freecomputerbooks.com SEO score

80

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

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

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 Freecomputerbooks.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 Freecomputerbooks.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

freecomputerbooks.com

Open Graph description is not detected on the main page of Free Computer Books. 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: