Access dusablemuseum.org. The DuSable Black History Museum and Education Center

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value28.1 s

0/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value1,090 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value28.0 s

0/100

10%

dusablemuseum.org

323 ms

www.dusablemuseum.org

544 ms

wpo-minify-header-aa298c43.min.css

206 ms

jquery.min.js

98 ms

jquery-migrate.min.js

107 ms

Our browser made a total of 131 requests to load all elements on the main page. We found that 93% of them (122 requests) were addressed to the original Dusablemuseum.org, 2% (2 requests) were made to Stats.wp.com and 2% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Google-analytics.com.

Content Size

9.0 MB

After Optimization

8.3 MB

In fact, the total size of Dusablemuseum.org main page is 9.0 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. Only a small number of websites need less resources to load. Images take 7.8 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 407.3 kB

Original 482.9 kB
After minification 475.1 kB
After compression 75.7 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 407.3 kB or 84% of the original size.

Image Optimization

-1%

Potential reduce by 111.2 kB

Original 7.8 MB
After minification 7.7 MB

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. Du Sable Museum images are well optimized though.

JavaScript Optimization

-32%

Potential reduce by 127.5 kB

Original 401.5 kB
After minification 395.4 kB
After compression 274.0 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 127.5 kB or 32% of the original size.

CSS Optimization

-15%

Potential reduce by 46.2 kB

Original 317.8 kB
After minification 283.3 kB
After compression 271.6 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. Dusablemuseum.org needs all CSS files to be minified and compressed as it can save up to 46.2 kB or 15% of the original size.

Requests Now

109

After Optimization

The browser has sent 109 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Du Sable Museum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 67 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

High

Some elements have a [tabindex] value greater than 0

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

High

Page is blocked from indexing

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dusablemuseum.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 Dusablemuseum.org main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

dusablemuseum.org

Open Graph data is detected on the main page of Du Sable Museum. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

The DuSable Black History Museum and Education Center

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

dusablemuseum.org

www.dusablemuseum.org

wpo-minify-header-aa298c43.min.css

jquery.min.js

jquery-migrate.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

dusablemuseum.org

www.dusablemuseum.org

wpo-minify-header-aa298c43.min.css

jquery.min.js

jquery-migrate.min.js

all-in-one-no-lazy.min.js

local.no-lazy.min.js

jquery.fancybox.min.js

wpmenucart-ajax-assist.min.js

s-202239.js

jquery.nivo.slider.js

editable.js

jquery.image_zoom.min.js

image_zoom-init.js

js

animations.css

include.css

style.css

jquery.min.js

bootstrap.min.js

lightslider.js

css3-animate-it.js

mc-validate.js

mixitup.min.js

wpo-minify-footer-06781df9.min.css

core.min.js

menu.min.js

regenerator-runtime.min.js

wp-polyfill.min.js

dom-ready.min.js

hooks.min.js

i18n.min.js

a11y.min.js

autocomplete.min.js

index.js

jquery.datetimepicker.full.min.js

datetimepicker.js

rtafar.local.js

jquery.blockUI.min.js

add-to-cart.min.js

e-202239.js

js.cookie.min.js

woocommerce.min.js