987 ms in total
24 ms
713 ms
250 ms
Click here to check amazing Library Of Congress content. Otherwise, check out these important facts you probably never knew about libraryofcongress.gov
The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.
Visit libraryofcongress.govWe analyzed Libraryofcongress.gov page load time and found that the first response time was 24 ms and then it took 963 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.
libraryofcongress.gov performance score
name
value
score
weighting
Value4.4 s
16/100
10%
Value21.8 s
0/100
25%
Value9.6 s
11/100
10%
Value1,070 ms
24/100
30%
Value0.111
87/100
15%
Value20.7 s
2/100
10%
24 ms
61 ms
21 ms
60 ms
213 ms
Our browser made a total of 45 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Libraryofcongress.gov, 89% (40 requests) were made to Loc.gov and 4% (2 requests) were made to Cdn.loc.gov. The less responsive or slowest element that took the longest time to load (405 ms) relates to the external source Loc.gov.
Page size can be reduced by 818.2 kB (46%)
1.8 MB
949.2 kB
In fact, the total size of Libraryofcongress.gov main page is 1.8 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. 60% of websites need less resources to load. Images take 751.1 kB which makes up the majority of the site volume.
Potential reduce by 95.0 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 46.8 kB, which is 42% 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 95.0 kB or 85% of the original size.
Potential reduce by 4.2 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. Library Of Congress images are well optimized though.
Potential reduce by 439.4 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 439.4 kB or 75% of the original size.
Potential reduce by 279.6 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. Libraryofcongress.gov needs all CSS files to be minified and compressed as it can save up to 279.6 kB or 88% of the original size.
Number of requests can be reduced by 8 (19%)
42
34
The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Library Of Congress. 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.
libraryofcongress.gov
24 ms
www.loc.gov
61 ms
base.css
21 ms
jquery-1.8.2.min.js
60 ms
base.js
213 ms
share.js
125 ms
s_code.js
125 ms
sprite-globalnav.png
104 ms
library-of-congress-logo.png
401 ms
digital-collections.jpg
108 ms
prints-and-photographs.jpg
387 ms
historic-newspapers.jpg
390 ms
performing-arts.jpg
387 ms
veterans-history.jpg
388 ms
sound-recordings.jpg
389 ms
film.jpg
391 ms
maps.jpg
389 ms
manuscripts.jpg
390 ms
sprite-loc.png
393 ms
today-in-history.jpg
393 ms
places-in-the-news.jpg
392 ms
blogs.jpg
393 ms
apps.jpg
393 ms
read-dot-gov.jpg
394 ms
nbf-2016-home-thumb.jpg
395 ms
carousel-1.jpg
397 ms
carousel-2.jpg
395 ms
carousel-3.jpg
396 ms
carousel-4.jpg
402 ms
carousel-5.jpg
405 ms
map_nation_exhibits_thumb.jpg
397 ms
exploring_exhibit_thumb.jpg
402 ms
hope_exhibit_thumb.jpg
405 ms
logo-home-congress.png
403 ms
logo-home-copyright.png
404 ms
logo-home-catalog.png
405 ms
style.css
194 ms
grab.png
107 ms
rs-minimal-white.png
108 ms
print.gif
108 ms
rss.gif
108 ms
share.gif
108 ms
feedback.png
108 ms
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63 ms
s66155443680472
38 ms
libraryofcongress.gov accessibility score
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
[aria-hidden="true"] elements contain focusable descendents
[aria-*] attributes do not have valid values
libraryofcongress.gov 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
libraryofcongress.gov 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
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 Libraryofcongress.gov 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 Libraryofcongress.gov 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.
libraryofcongress.gov
Open Graph description is not detected on the main page of Library Of Congress. 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: