Report Summary

  • 23

    Performance

    Renders faster than
    42% of other websites

  • 53

    Accessibility

    Visual factors better than
    that of 22% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

cs.du.ac.in

Department of Computer Science - University of Delhi

Page Load Speed

8.7 sec in total

First Response

1.5 sec

Resources Loaded

7.1 sec

Page Rendered

148 ms

cs.du.ac.in screenshot

About Website

Welcome to cs.du.ac.in homepage info - get ready to check Cs Du best content for India right away, or after learning these important things about cs.du.ac.in

Department of Computer Science, Delhi University

Visit cs.du.ac.in

Key Findings

We analyzed Cs.du.ac.in page load time and found that the first response time was 1.5 sec and then it took 7.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

cs.du.ac.in performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

7/100

10%

LCP (Largest Contentful Paint)

Value15.6 s

0/100

25%

SI (Speed Index)

Value14.6 s

1/100

10%

TBT (Total Blocking Time)

Value560 ms

53/100

30%

CLS (Cumulative Layout Shift)

Value0.304

39/100

15%

TTI (Time to Interactive)

Value16.2 s

6/100

10%

Network Requests Diagram

cs.du.ac.in

1472 ms

style.css

564 ms

cssmenuhorizontal.css

568 ms

jquery_002.js

2279 ms

jquery.js

1159 ms

Our browser made a total of 35 requests to load all elements on the main page. We found that 57% of them (20 requests) were addressed to the original Cs.du.ac.in, 9% (3 requests) were made to S7.addthis.com and 9% (3 requests) were made to Cdn.clustrmaps.com. The less responsive or slowest element that took the longest time to load (3.8 sec) belongs to the original domain Cs.du.ac.in.

Page Optimization Overview & Recommendations

Page size can be reduced by 584.2 kB (40%)

Content Size

1.5 MB

After Optimization

871.2 kB

In fact, the total size of Cs.du.ac.in main page is 1.5 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. 30% of websites need less resources to load. Images take 707.4 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 62.7 kB

  • Original 89.7 kB
  • After minification 86.2 kB
  • After compression 27.0 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 62.7 kB or 70% of the original size.

Image Optimization

-11%

Potential reduce by 80.3 kB

  • Original 707.4 kB
  • After minification 627.1 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, Cs Du needs image optimization as it can save up to 80.3 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-67%

Potential reduce by 433.0 kB

  • Original 648.2 kB
  • After minification 579.2 kB
  • After compression 215.1 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 433.0 kB or 67% of the original size.

CSS Optimization

-80%

Potential reduce by 8.1 kB

  • Original 10.2 kB
  • After minification 7.3 kB
  • After compression 2.0 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. Cs.du.ac.in needs all CSS files to be minified and compressed as it can save up to 8.1 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (28%)

Requests Now

32

After Optimization

23

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cs Du. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

cs.du.ac.in accessibility score

53

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

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

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

cs.du.ac.in best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

cs.du.ac.in SEO score

82

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Content Best Practices

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

Impact

Issue

High

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

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 Cs.du.ac.in 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 Cs.du.ac.in 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 description is not detected on the main page of Cs Du. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: