830 ms in total
50 ms
654 ms
126 ms
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Visit library.yale.eduWe analyzed Library.yale.edu page load time and found that the first response time was 50 ms and then it took 780 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.
library.yale.edu performance score
name
value
score
weighting
Value3.5 s
35/100
10%
Value14.2 s
0/100
25%
Value4.3 s
76/100
10%
Value1,130 ms
22/100
30%
Value0.141
78/100
15%
Value12.0 s
16/100
10%
50 ms
84 ms
20 ms
34 ms
30 ms
Our browser made a total of 42 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Library.yale.edu, 64% (27 requests) were made to Web.library.yale.edu and 10% (4 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (124 ms) relates to the external source Google-analytics.com.
Page size can be reduced by 597.9 kB (60%)
1.0 MB
403.8 kB
In fact, the total size of Library.yale.edu main page is 1.0 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. 45% of websites need less resources to load. Javascripts take 527.1 kB which makes up the majority of the site volume.
Potential reduce by 74.8 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 74.8 kB or 73% of the original size.
Potential reduce by 21.8 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. Obviously, Library Yale needs image optimization as it can save up to 21.8 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 344.7 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 344.7 kB or 65% of the original size.
Potential reduce by 156.7 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. Library.yale.edu needs all CSS files to be minified and compressed as it can save up to 156.7 kB or 82% of the original size.
Number of requests can be reduced by 29 (78%)
37
8
The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Library Yale. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.
library.yale.edu
50 ms
web.library.yale.edu
84 ms
css_kShW4RPmRstZ3SpIC-ZvVGNFVAi0WEMuCnI0ZkYIaFw.css
20 ms
css_hTLrwzbU9bZhjvzx-j5entbJFEHkjJyd6RgHEla8FhA.css
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27 ms
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css_6CO-4qWWW8-gC1Ro1LihnAFb1tgMb3chlPH0QEriktA.css
45 ms
jquery.min.js
37 ms
js_3TykeRWpejhD4-J3vdlaNXdULg9xhOZhbsppK0o2bUs.js
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jquery-ui.min.js
58 ms
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js_yKqknZVrWT-wz_eftS7bF-haOycTGjMlf5RCa0VjcTQ.js
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addthis_widget.js
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analytics.js
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gtm.js
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floating-css.43dfaad4c1b62b2ec5cb.js
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library.yale.edu accessibility score
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
Buttons do not have an accessible name
library.yale.edu 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
library.yale.edu SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Library.yale.edu 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 Library.yale.edu 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.
library.yale.edu
Open Graph description is not detected on the main page of Library Yale. 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: