Access poloclub.github.io. Polo Club of Data Science @ Georgia Tech: Human-Centered AI, Deep Learning Interpretation & Visualiz...

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

77/100

10%

LCP (Largest Contentful Paint)

Value3.5 s

63/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value1,080 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value7.1 s

52/100

10%

poloclub.github.io

21 ms

poloclub.github.io

66 ms

js

115 ms

bootstrap.min.css

32 ms

agency.css

40 ms

Our browser made a total of 254 requests to load all elements on the main page. We found that 98% of them (248 requests) were addressed to the original Poloclub.github.io, 2% (4 requests) were made to Fonts.gstatic.com and 0% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (271 ms) belongs to the original domain Poloclub.github.io.

Content Size

36.6 MB

After Optimization

30.7 MB

In fact, the total size of Poloclub.github.io main page is 36.6 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 35.9 MB which makes up the majority of the site volume.

HTML Optimization

-94%

Potential reduce by 613.5 kB

Original 652.7 kB
After minification 360.3 kB
After compression 39.2 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 292.4 kB, which is 45% 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 613.5 kB or 94% of the original size.

Image Optimization

-15%

Potential reduce by 5.3 MB

Original 35.9 MB
After minification 30.6 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. Obviously, Polo Club Github needs image optimization as it can save up to 5.3 MB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

Requests Now

245

After Optimization

230

The browser has sent 245 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Polo Club Github. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 5 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 the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

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

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

Search Engine Optimization Advices

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

High

Links are not crawlable

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

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Poloclub.github.io can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Poloclub.github.io 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.

Social Sharing Optimization

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