3.7 sec in total
1.3 sec
2.2 sec
195 ms
Visit sfhistory.org now to see the best up-to-date Sfhistory content for United States and also check out these interesting facts you probably never knew about sfhistory.org
Welcome! The San Francisco Historical Society exists to uncover, preserve, and present, in engaging ways, the colorful and diverse history of our city from its earliest days to the present. Our museum...
Visit sfhistory.orgWe analyzed Sfhistory.org page load time and found that the first response time was 1.3 sec and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
sfhistory.org performance score
name
value
score
weighting
Value4.8 s
11/100
10%
Value25.7 s
0/100
25%
Value13.6 s
2/100
10%
Value1,330 ms
17/100
30%
Value0.212
59/100
15%
Value20.8 s
2/100
10%
1310 ms
69 ms
133 ms
173 ms
152 ms
Our browser made a total of 33 requests to load all elements on the main page. We found that 88% of them (29 requests) were addressed to the original Sfhistory.org, 6% (2 requests) were made to Google-analytics.com and 3% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Sfhistory.org.
Page size can be reduced by 738.9 kB (57%)
1.3 MB
559.4 kB
In fact, the total size of Sfhistory.org main page is 1.3 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. 25% of websites need less resources to load. Javascripts take 592.3 kB which makes up the majority of the site volume.
Potential reduce by 19.9 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 19.9 kB or 79% of the original size.
Potential reduce by 63.1 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, Sfhistory needs image optimization as it can save up to 63.1 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 416.3 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 416.3 kB or 70% of the original size.
Potential reduce by 239.6 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. Sfhistory.org needs all CSS files to be minified and compressed as it can save up to 239.6 kB or 85% of the original size.
Number of requests can be reduced by 25 (78%)
32
7
The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sfhistory. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
sfhistory.org
1310 ms
modal.css
69 ms
style-red.css
133 ms
joomla30-red-extended.css
173 ms
joomla30-red-responsive.css
152 ms
font-awesome.min.css
156 ms
jssocialicons.css
162 ms
socialicons-global-48.css
196 ms
jquery.gcal_flow.css
242 ms
mootools-core.js
248 ms
core.js
240 ms
mootools-more.js
401 ms
jquery.min.js
276 ms
jquery-noconflict.js
276 ms
jquery-migrate.min.js
304 ms
caption.js
314 ms
bootstrap.min.js
307 ms
modal.js
323 ms
html5shiv.js
322 ms
jquery.gcal_flow.js
385 ms
globalize.js
385 ms
globalize.culture.en-US.js
392 ms
css
26 ms
utils.js
384 ms
jquery.equalheights.js
485 ms
fallback.js
485 ms
analytics.js
20 ms
filter-bg.png
98 ms
EQBanner.jpg
444 ms
logo.png
69 ms
events
182 ms
collect
18 ms
socialicons-elegant-48.png
137 ms
sfhistory.org 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
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
Image elements do not have [alt] attributes
Links do not have a discernible name
sfhistory.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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
sfhistory.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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 Sfhistory.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 Sfhistory.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.
sfhistory.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: