797 ms in total
64 ms
536 ms
197 ms
Visit loc.gov now to see the best up-to-date Loc content for United States and also check out these interesting facts you probably never knew about loc.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 loc.govWe analyzed Loc.gov page load time and found that the first response time was 64 ms and then it took 733 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.
loc.gov performance score
name
value
score
weighting
Value5.2 s
8/100
10%
Value9.2 s
1/100
25%
Value10.2 s
9/100
10%
Value3,520 ms
1/100
30%
Value0.11
87/100
15%
Value24.2 s
0/100
10%
64 ms
18 ms
61 ms
151 ms
109 ms
Our browser made a total of 44 requests to load all elements on the main page. We found that 91% of them (40 requests) were addressed to the original Loc.gov, 5% (2 requests) were made to Cdn.loc.gov and 2% (1 request) were made to . The less responsive or slowest element that took the longest time to load (264 ms) belongs to the original domain Loc.gov.
Page size can be reduced by 2.0 MB (47%)
4.2 MB
2.2 MB
In fact, the total size of Loc.gov main page is 4.2 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. 55% of websites need less resources to load. Javascripts take 1.7 MB which makes up the majority of the site volume.
Potential reduce by 95.2 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 46.9 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 95.2 kB or 85% of the original size.
Potential reduce by 29.7 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. Loc images are well optimized though.
Potential reduce by 1.2 MB
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 1.2 MB or 71% of the original size.
Potential reduce by 618.9 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. Loc.gov needs all CSS files to be minified and compressed as it can save up to 618.9 kB or 87% 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 Loc. 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.
www.loc.gov
64 ms
base.css
18 ms
jquery-1.8.2.min.js
61 ms
base.js
151 ms
share.js
109 ms
s_code.js
158 ms
sprite-globalnav.png
60 ms
library-of-congress-logo.png
264 ms
digital-collections.jpg
241 ms
prints-and-photographs.jpg
65 ms
historic-newspapers.jpg
253 ms
performing-arts.jpg
253 ms
veterans-history.jpg
254 ms
sound-recordings.jpg
253 ms
film.jpg
253 ms
maps.jpg
254 ms
manuscripts.jpg
254 ms
sprite-loc.png
254 ms
today-in-history.jpg
255 ms
places-in-the-news.jpg
255 ms
blogs.jpg
257 ms
apps.jpg
256 ms
read-dot-gov.jpg
255 ms
nbf-15th-loc-home-thumb.jpg
256 ms
carousel-1.jpg
258 ms
carousel-2.jpg
257 ms
carousel-3.jpg
257 ms
carousel-4.jpg
259 ms
carousel-5.jpg
258 ms
map_nation_exhibits_thumb.jpg
259 ms
exploring_exhibit_thumb.jpg
259 ms
hope_exhibit_thumb.jpg
260 ms
logo-home-congress.png
259 ms
logo-home-copyright.png
260 ms
logo-home-catalog.png
261 ms
style.css
81 ms
grab.png
44 ms
rs-minimal-white.png
45 ms
print.gif
44 ms
rss.gif
44 ms
share.gif
46 ms
feedback.png
45 ms
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27 ms
s38700584776233
41 ms
loc.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
loc.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
loc.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 Loc.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 Loc.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.
loc.gov
Open Graph description is not detected on the main page of Loc. 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: