Access cityofchicago.org. City of Chicago

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value8.4 s

2/100

25%

SI (Speed Index)

Value10.3 s

8/100

10%

TBT (Total Blocking Time)

Value1,670 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.102

89/100

15%

TTI (Time to Interactive)

Value21.8 s

1/100

10%

www.cityofchicago.org

251 ms

www.chicago.gov

153 ms

en.html

90 ms

main.min.css

292 ms

all.min.css

245 ms

Our browser made a total of 76 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Cityofchicago.org, 38% (29 requests) were made to Chicago.gov and 12% (9 requests) were made to Webapps1.chicago.gov. The less responsive or slowest element that took the longest time to load (696 ms) relates to the external source Chicago.gov.

Content Size

2.1 MB

After Optimization

1.3 MB

In fact, the total size of Cityofchicago.org main page is 2.1 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 61.8 kB

Original 77.3 kB
After minification 67.4 kB
After compression 15.6 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 9.9 kB, which is 13% 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 61.8 kB or 80% of the original size.

Image Optimization

-42%

Potential reduce by 638.7 kB

Original 1.5 MB
After minification 869.1 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, City Of Chicago needs image optimization as it can save up to 638.7 kB or 42% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-11%

Potential reduce by 37.3 kB

Original 340.8 kB
After minification 340.8 kB
After compression 303.5 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 37.3 kB or 11% of the original size.

CSS Optimization

-17%

Potential reduce by 26.6 kB

Original 160.0 kB
After minification 160.0 kB
After compression 133.4 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. Cityofchicago.org needs all CSS files to be minified and compressed as it can save up to 26.6 kB or 17% of the original size.

Requests Now

After Optimization

The browser has sent 70 CSS, Javascripts, AJAX and image requests in order to completely render the main page of City Of Chicago. 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 10 to 1 for CSS and as a result speed up the page load time.