Tools & Wizards About Us
bookshelfcentral.com screenshot

Report Summary

  • 31

    Performance

    Renders faster than
    51% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 61% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

bookshelfcentral.com

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Page Load Speed

1.6 sec in total

First Response

359 ms

Resources Loaded

1 sec

Page Rendered

227 ms

bookshelfcentral.com screenshot

About Website

Click here to check amazing Bookshelfcentral content for United States. Otherwise, check out these important facts you probably never knew about bookshelfcentral.com

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Key Findings

We analyzed Bookshelfcentral.com page load time and found that the first response time was 359 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster. This domain responded with an error, which can significantly jeopardize Bookshelfcentral.com rating and web reputation

Performance Metrics

bookshelfcentral.com performance score

31

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

19/100

10%

LCP (Largest Contentful Paint)

Value18.6 s

0/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value790 ms

37/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value11.0 s

20/100

10%

Network Requests Diagram

bookshelfcentral.com

359 ms

reset.css

65 ms

style_imagehover.css

89 ms

stylesheet.css

92 ms

stylesheet_address_changes.css

96 ms

Our browser made a total of 66 requests to load all elements on the main page. We found that 92% of them (61 requests) were addressed to the original Bookshelfcentral.com, 6% (4 requests) were made to Google-analytics.com and 2% (1 request) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (359 ms) belongs to the original domain Bookshelfcentral.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 223.7 kB (18%)

Content Size

1.2 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Bookshelfcentral.com main page is 1.2 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. 35% of websites need less resources to load. Images take 992.5 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 23.8 kB

  • Original 29.2 kB
  • After minification 26.4 kB
  • After compression 5.4 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 23.8 kB or 82% of the original size.

Image Optimization

-7%

Potential reduce by 73.7 kB

  • Original 992.5 kB
  • After minification 918.8 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. Bookshelfcentral images are well optimized though.

JavaScript Optimization

-53%

Potential reduce by 87.8 kB

  • Original 165.9 kB
  • After minification 157.1 kB
  • After compression 78.1 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 87.8 kB or 53% of the original size.

CSS Optimization

-78%

Potential reduce by 38.5 kB

  • Original 49.1 kB
  • After minification 38.8 kB
  • After compression 10.6 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. Bookshelfcentral.com needs all CSS files to be minified and compressed as it can save up to 38.5 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 41 (65%)

Requests Now

63

After Optimization

22

  • Images
  • JavaScript
  • CSS

The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bookshelfcentral. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

bookshelfcentral.com

bookshelfcentral.com

359 ms

reset.css

reset.css

65 ms

style_imagehover.css

style_imagehover.css

89 ms

stylesheet.css

stylesheet.css

92 ms

stylesheet_address_changes.css

stylesheet_address_changes.css

96 ms

stylesheet_basket_popup.css

stylesheet_basket_popup.css

94 ms

stylesheet_coda-slider-2.css

stylesheet_coda-slider-2.css

96 ms

stylesheet_login.css

stylesheet_login.css

108 ms

stylesheet_newstyle.css

stylesheet_newstyle.css

133 ms

stylesheet_simple.css

stylesheet_simple.css

136 ms

stylesheet_slimbox_ex.css

stylesheet_slimbox_ex.css

141 ms

stylesheet_tpp.css

stylesheet_tpp.css

138 ms

jscript_imagehover.js

jscript_imagehover.js

142 ms

jscript_showhide.js

jscript_showhide.js

155 ms

jscript_showsuboptions.js

jscript_showsuboptions.js

176 ms

jscript_tpp.js

jscript_tpp.js

179 ms

jquery-1.4.4.min.js

jquery-1.4.4.min.js

269 ms

jquery.tools.min.js

jquery.tools.min.js

183 ms

showhide-broad.js

showhide-broad.js

184 ms

jquery.easing.1.3.js

jquery.easing.1.3.js

200 ms

news-slider.js

news-slider.js

219 ms

alt_tpp_tabs13.css

alt_tpp_tabs13.css

89 ms

bg.jpg

bg.jpg

96 ms

logo.png

logo.png

172 ms

BC_PrimerBanner2.jpg

BC_PrimerBanner2.jpg

173 ms

bnr-findbooks.jpg

bnr-findbooks.jpg

123 ms

facebook.jpg

facebook.jpg

95 ms

baner1.png

baner1.png

127 ms

baner2.png

baner2.png

171 ms

cat-hdr.png

cat-hdr.png

123 ms

bg-top.png

bg-top.png

309 ms

search-bg.gif

search-bg.gif

102 ms

search-btn.png

search-btn.png

102 ms

analytics.js

analytics.js

15 ms

bnr-togbooks.png

bnr-togbooks.png

162 ms

choose-yp.png

choose-yp.png

125 ms

y1.png

y1.png

126 ms

y2.png

y2.png

121 ms

y3.png

y3.png

131 ms

y4.png

y4.png

166 ms

choose-unit.png

choose-unit.png

171 ms

units-all.png

units-all.png

170 ms

units-choose.png

units-choose.png

175 ms

choose-lvl.png

choose-lvl.png

206 ms

lvl-l.png

lvl-l.png

211 ms

lvl-u.png

lvl-u.png

215 ms

lvl-d.png

lvl-d.png

215 ms

lvl-r.png

lvl-r.png

220 ms

choose-subj.png

choose-subj.png

250 ms

subj-all.png

subj-all.png

255 ms

subj-choose.png

subj-choose.png

259 ms

choose-list.png

choose-list.png

261 ms

layout.png

layout.png

263 ms

table.png

table.png

293 ms

viewbooks.gif

viewbooks.gif

301 ms

collect

collect

6 ms

collect

collect

73 ms

newsletter-bg.png

newsletter-bg.png

320 ms

cat-bg.png

cat-bg.png

283 ms

bg-mid.png

bg-mid.png

285 ms

bg-ftr.png

bg-ftr.png

310 ms

ga.js

ga.js

3 ms

__utm.gif

__utm.gif

16 ms

ajax-loader.gif

ajax-loader.gif

263 ms

news-tab.png

news-tab.png

271 ms

news-tab-h.png

news-tab-h.png

281 ms

Accessibility Review

bookshelfcentral.com accessibility score

86

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.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

bookshelfcentral.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

SEO Factors

bookshelfcentral.com SEO score

84

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

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 Bookshelfcentral.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 Bookshelfcentral.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

bookshelfcentral.com

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