2 sec in total
405 ms
1.4 sec
131 ms
Welcome to sfpl.org homepage info - get ready to check Sfpl best content for United States right away, or after learning these important things about sfpl.org
The website of the San Francisco Public Library.
Visit sfpl.orgWe analyzed Sfpl.org page load time and found that the first response time was 405 ms and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.
sfpl.org performance score
name
value
score
weighting
Value3.7 s
30/100
10%
Value4.1 s
47/100
25%
Value17.3 s
0/100
10%
Value4,870 ms
0/100
30%
Value0.836
4/100
15%
Value37.9 s
0/100
10%
405 ms
315 ms
160 ms
157 ms
238 ms
Our browser made a total of 32 requests to load all elements on the main page. We found that 91% of them (29 requests) were addressed to the original Sfpl.org, 6% (2 requests) were made to Google-analytics.com and 3% (1 request) were made to Sfpl.bibliocommons.com. The less responsive or slowest element that took the longest time to load (460 ms) belongs to the original domain Sfpl.org.
Page size can be reduced by 391.5 kB (56%)
705.0 kB
313.5 kB
In fact, the total size of Sfpl.org main page is 705.0 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. 15% of websites need less resources to load. Images take 352.2 kB which makes up the majority of the site volume.
Potential reduce by 14.8 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. This page needs HTML code to be minified as it can gain 3.0 kB, which is 16% 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 14.8 kB or 77% of the original size.
Potential reduce by 140.9 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, Sfpl needs image optimization as it can save up to 140.9 kB or 40% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 168.9 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 168.9 kB or 67% of the original size.
Potential reduce by 66.9 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. Sfpl.org needs all CSS files to be minified and compressed as it can save up to 66.9 kB or 82% of the original size.
Number of requests can be reduced by 17 (55%)
31
14
The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sfpl. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
sfpl.org
405 ms
basic.css
315 ms
basic.css.php
160 ms
mediumtext.css
157 ms
home.css
238 ms
require.js
317 ms
map.js
395 ms
home.js
239 ms
analytics.js
42 ms
page_white.gif
84 ms
background_header.jpg
315 ms
facebook_icon.gif
84 ms
twitter.png
79 ms
pinterest.15x15.png
86 ms
instagram.15x15.png
86 ms
2003.jpg
314 ms
bullet.gif
162 ms
black-history.jpg
163 ms
ereader.jpg
163 ms
exhibits.jpg
164 ms
friends.jpg
239 ms
sfpl_historical_photo.jpg
403 ms
search.png
242 ms
city_seal.gif
242 ms
survey.png
460 ms
dialog.png
303 ms
jquery-1.10.2.min.js
456 ms
urlParams.js
359 ms
sdk.js
68 ms
collect
23 ms
jquery.placeholder.min.js
81 ms
print.css
82 ms
sfpl.org accessibility score
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
Links do not have a discernible name
sfpl.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
sfpl.org 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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sfpl.org 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 Sfpl.org 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.
sfpl.org
Open Graph data is detected on the main page of PARSED_DOMAIN, but there is no image specified in description. It would be a good idea for the website admin to select a nice image that can properly represent the website in Open Graph data, otherwise the first found image will be taken for this purpose and social media information block will look like this: