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Report Summary

  • 92

    Performance

    Renders faster than
    92% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

subscribe.packtpub.com

Packt Subscription | Tech library of 7,500 + eBooks & Videos

Page Load Speed

2.1 sec in total

First Response

68 ms

Resources Loaded

1.1 sec

Page Rendered

892 ms

subscribe.packtpub.com screenshot

About Website

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Key Findings

We analyzed Subscribe.packtpub.com page load time and found that the first response time was 68 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

subscribe.packtpub.com performance score

92

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value2.4 s

92/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value180 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.0 s

87/100

10%

Network Requests Diagram

subscribe.packtpub.com

68 ms

subscribe

165 ms

subscribe

177 ms

subscribe-Dy0g3r2K.css

56 ms

js

693 ms

Our browser made a total of 89 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Subscribe.packtpub.com, 97% (86 requests) were made to Packtpub.com and 1% (1 request) were made to 91519dce225c6867.packtpub.com. The less responsive or slowest element that took the longest time to load (693 ms) relates to the external source 91519dce225c6867.packtpub.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 651.5 kB (28%)

Content Size

2.3 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • CSS

In fact, the total size of Subscribe.packtpub.com main page is 2.3 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. 30% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 651.5 kB

  • Original 725.7 kB
  • After minification 725.7 kB
  • After compression 74.2 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 651.5 kB or 90% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 1.6 MB
  • After minification 1.6 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. Subscribe Packt Pub images are well optimized though.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 10.5 kB
  • After minification 10.5 kB
  • After compression 10.5 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. Subscribe.packtpub.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 33 (38%)

Requests Now

86

After Optimization

53

  • Images
  • JavaScript
  • CSS

The browser has sent 86 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Subscribe Packt Pub. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

subscribe.packtpub.com

subscribe.packtpub.com

68 ms

subscribe

subscribe

165 ms

subscribe

subscribe

177 ms

subscribe-Dy0g3r2K.css

subscribe-Dy0g3r2K.css

56 ms

js

js

693 ms

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004da5c4-583f-4e69-a0a8-0e999f350f90_128px-Flag_of_Bulgaria.png

74 ms

logo-new-Dz-8EKdV.svg

logo-new-Dz-8EKdV.svg

34 ms

us.png

us.png

36 ms

gb.png

gb.png

38 ms

india.png

india.png

71 ms

germany.png

germany.png

56 ms

france.png

france.png

72 ms

canada.png

canada.png

53 ms

russia.png

russia.png

73 ms

spain.png

spain.png

78 ms

brazil.png

brazil.png

81 ms

australia.png

australia.png

79 ms

argentina.png

argentina.png

92 ms

austria.png

austria.png

101 ms

belgium.png

belgium.png

111 ms

chile.png

chile.png

97 ms

colombia.png

colombia.png

114 ms

cyprus.png

cyprus.png

103 ms

czech.png

czech.png

109 ms

denmark.png

denmark.png

120 ms

ecuador.png

ecuador.png

126 ms

egypt.png

egypt.png

129 ms

estonia.png

estonia.png

132 ms

finland.png

finland.png

137 ms

greece.png

greece.png

190 ms

hungary.png

hungary.png

135 ms

indonesia.png

indonesia.png

189 ms

ireland.png

ireland.png

187 ms

italy.png

italy.png

187 ms

japan.png

japan.png

188 ms

latvia.png

latvia.png

190 ms

lithuania.png

lithuania.png

191 ms

lux.png

lux.png

192 ms

malaysia.png

malaysia.png

191 ms

malta.png

malta.png

193 ms

mexico.png

mexico.png

194 ms

netherlands.png

netherlands.png

206 ms

newzealand.png

newzealand.png

167 ms

norway.png

norway.png

171 ms

philippines.png

philippines.png

170 ms

poland.png

poland.png

153 ms

portugal.png

portugal.png

162 ms

romania.png

romania.png

155 ms

singapore.png

singapore.png

166 ms

slovakia.png

slovakia.png

151 ms

slovenia.png

slovenia.png

147 ms

southafrica.png

southafrica.png

152 ms

southkorea.png

southkorea.png

171 ms

sweden.png

sweden.png

169 ms

switzerland.png

switzerland.png

152 ms

taiwan.png

taiwan.png

143 ms

thailand.png

thailand.png

157 ms

turkey.png

turkey.png

156 ms

ukraine.png

ukraine.png

146 ms

hero-section-C6LExby7.png

hero-section-C6LExby7.png

164 ms

trust-banner-CZ_masYP.svg

trust-banner-CZ_masYP.svg

178 ms

open_book-Dj89-Yc5.svg

open_book-Dj89-Yc5.svg

249 ms

cup_bulb-DG0rsLfy.svg

cup_bulb-DG0rsLfy.svg

155 ms

mobile_desktop-Bek1YzzF.svg

mobile_desktop-Bek1YzzF.svg

144 ms

user_settings-B7A95uFC.svg

user_settings-B7A95uFC.svg

154 ms

support-BK-1fhnT.svg

support-BK-1fhnT.svg

158 ms

clock_support-DfkzdOLE.svg

clock_support-DfkzdOLE.svg

126 ms

packt-logo-C9kXYvOX.webp

packt-logo-C9kXYvOX.webp

127 ms

data-Cjd3zmZB.svg

data-Cjd3zmZB.svg

138 ms

programming-DQmzhlBG.svg

programming-DQmzhlBG.svg

126 ms

cloud-and-networking-GTNnRPwQ.svg

cloud-and-networking-GTNnRPwQ.svg

135 ms

web-development-DZ8Uybny.svg

web-development-DZ8Uybny.svg

141 ms

business-and-other-pBoeFlEu.svg

business-and-other-pBoeFlEu.svg

144 ms

security-C8jGCPRr.svg

security-C8jGCPRr.svg

140 ms

game-development-BmdUU-kp.svg

game-development-BmdUU-kp.svg

163 ms

mobile-CazRio82.svg

mobile-CazRio82.svg

178 ms

iot-and-hardware-B21m-9x8.svg

iot-and-hardware-B21m-9x8.svg

163 ms

google-Cx7gYvWL.svg

google-Cx7gYvWL.svg

159 ms

amazon-bYUsn4Er.svg

amazon-bYUsn4Er.svg

165 ms

microsoft-Cx_pVAiI.svg

microsoft-Cx_pVAiI.svg

173 ms

oracle-DgxVh2Cb.svg

oracle-DgxVh2Cb.svg

180 ms

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177 ms

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salesforce-CvLPi9zP.svg

179 ms

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thin-up-arrow-DPUVbA00.svg

181 ms

features-background-C9IdTPll.svg

features-background-C9IdTPll.svg

177 ms

ai_assistant-BPN1eS31.webp

ai_assistant-BPN1eS31.webp

174 ms

dashboard-DZXMXxDQ.webp

dashboard-DZXMXxDQ.webp

187 ms

advance_search-BSl-oAvB.webp

advance_search-BSl-oAvB.webp

175 ms

reader-BydxuoCa.webp

reader-BydxuoCa.webp

206 ms

Accessibility Review

subscribe.packtpub.com accessibility score

98

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

subscribe.packtpub.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

subscribe.packtpub.com SEO score

93

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

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 Subscribe.packtpub.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 Subscribe.packtpub.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

subscribe.packtpub.com

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