991 ms in total
84 ms
810 ms
97 ms
Visit bookshelf.vitalsource.com now to see the best up-to-date Bookshelf Vital Source content for United States and also check out these interesting facts you probably never knew about bookshelf.vitalsource.com
VitalSource Bookshelf is the world’s leading platform for distributing, accessing, consuming, and engaging with digital textbooks and course materials.
Visit bookshelf.vitalsource.comWe analyzed Bookshelf.vitalsource.com page load time and found that the first response time was 84 ms and then it took 907 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.
bookshelf.vitalsource.com performance score
name
value
score
weighting
Value17.4 s
0/100
10%
Value22.0 s
0/100
25%
Value17.4 s
0/100
10%
Value2,410 ms
5/100
30%
Value0.002
100/100
15%
Value22.0 s
1/100
10%
84 ms
194 ms
252 ms
324 ms
337 ms
Our browser made a total of 15 requests to load all elements on the main page. We found that 87% of them (13 requests) were addressed to the original Bookshelf.vitalsource.com, 7% (1 request) were made to Jigsaw.vitalsource.com and 7% (1 request) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (337 ms) belongs to the original domain Bookshelf.vitalsource.com.
Page size can be reduced by 562.1 kB (73%)
768.0 kB
205.9 kB
In fact, the total size of Bookshelf.vitalsource.com main page is 768.0 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. Only 10% of websites need less resources to load. Javascripts take 583.1 kB which makes up the majority of the site volume.
Potential reduce by 2.5 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 2.5 kB or 68% of the original size.
Potential reduce by 403.4 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 403.4 kB or 69% of the original size.
Potential reduce by 156.3 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. Bookshelf.vitalsource.com needs all CSS files to be minified and compressed as it can save up to 156.3 kB or 86% of the original size.
Number of requests can be reduced by 3 (23%)
13
10
The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bookshelf Vital Source. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.
bookshelf.vitalsource.com
84 ms
bookshelf.vitalsource.com
194 ms
vendor.min-a585bf74.js
252 ms
box.js
324 ms
fraction.min-e0e56691.js
337 ms
fraction.min-ce3a83e2.css
202 ms
analytics.js
51 ms
bookshelf.vitalsource.com.json
38 ms
roboto-v15-latin-regular.woff
45 ms
roboto-v15-latin-500.woff
43 ms
roboto-v15-latin-300.woff
142 ms
roboto-v15-latin-100.woff
70 ms
roboto-v15-latin-700.woff
76 ms
roboto-v15-latin-900.woff
76 ms
en.json
104 ms
bookshelf.vitalsource.com accessibility score
bookshelf.vitalsource.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
bookshelf.vitalsource.com SEO score
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
Document uses legible font sizes
EN
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Bookshelf.vitalsource.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 Bookshelf.vitalsource.com main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
bookshelf.vitalsource.com
Open Graph description is not detected on the main page of Bookshelf Vital Source. 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: