1.5 sec in total
33 ms
1.1 sec
271 ms
Click here to check amazing USM Redshelf content for United States. Otherwise, check out these important facts you probably never knew about usm.redshelf.com
Buy, sell and read - eBooks, textbooks, academic materials, magazines, documents and other digital content on RedShelf, the HTML5 cloud reader and marketplace.
Visit usm.redshelf.comWe analyzed Usm.redshelf.com page load time and found that the first response time was 33 ms and then it took 1.4 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.
usm.redshelf.com performance score
name
value
score
weighting
Value4.5 s
15/100
10%
Value5.3 s
21/100
25%
Value4.7 s
68/100
10%
Value440 ms
64/100
30%
Value0.01
100/100
15%
Value8.7 s
36/100
10%
33 ms
491 ms
27 ms
50 ms
46 ms
Our browser made a total of 27 requests to load all elements on the main page. We found that 44% of them (12 requests) were addressed to the original Usm.redshelf.com, 44% (12 requests) were made to Images.redshelf.com and 7% (2 requests) were made to Content.redshelf.com. The less responsive or slowest element that took the longest time to load (491 ms) belongs to the original domain Usm.redshelf.com.
Page size can be reduced by 262.4 kB (37%)
702.7 kB
440.3 kB
In fact, the total size of Usm.redshelf.com main page is 702.7 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. 30% of websites need less resources to load. Images take 389.3 kB which makes up the majority of the site volume.
Potential reduce by 37.2 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. This page needs HTML code to be minified as it can gain 10.7 kB, which is 22% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 37.2 kB or 78% of the original size.
Potential reduce by 12.4 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. USM Redshelf images are well optimized though.
Potential reduce by 0 B
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.
Potential reduce by 212.8 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. Usm.redshelf.com needs all CSS files to be minified and compressed as it can save up to 212.8 kB or 83% of the original size.
Number of requests can be reduced by 5 (22%)
23
18
The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of USM Redshelf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for CSS and as a result speed up the page load time.
usm.redshelf.com
33 ms
usm.redshelf.com
491 ms
ae894fd1855e.css
27 ms
7417d4eaa887.css
50 ms
b94ba46da52b.css
46 ms
b2bc02dbad04.css
45 ms
ionicons.min.css
54 ms
labels_v2.css
44 ms
71f788750d41.js
61 ms
154 ms
9780855755164.jpg
301 ms
116 ms
USM_Banner.png
123 ms
redshelf-read-anywhere-white.png
26 ms
9780976635321.jpg
299 ms
9781907284137.jpg
276 ms
9781907396175.jpg
348 ms
9781583476352.jpg
268 ms
9781133171522.jpg
284 ms
9781133713685.jpg
342 ms
9781285415420.jpg
350 ms
9781285415628.jpg
364 ms
9781285694351.jpg
382 ms
9781617310652.jpg
382 ms
9781617310591.jpg
423 ms
ionicons.ttf
128 ms
nr-885.min.js
41 ms
usm.redshelf.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
usm.redshelf.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
Missing source maps for large first-party JavaScript
usm.redshelf.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
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Usm.redshelf.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 Usm.redshelf.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.
usm.redshelf.com
Open Graph description is not detected on the main page of USM Redshelf. 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: