Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

csl.cornell.edu

Computer Systems Laboratory – Cornell University

Page Load Speed

561 ms in total

First Response

84 ms

Resources Loaded

254 ms

Page Rendered

223 ms

csl.cornell.edu screenshot

About Website

Visit csl.cornell.edu now to see the best up-to-date Csl Cornell content for United States and also check out these interesting facts you probably never knew about csl.cornell.edu

Visit csl.cornell.edu

Key Findings

We analyzed Csl.cornell.edu page load time and found that the first response time was 84 ms and then it took 477 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

csl.cornell.edu performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.3 s

0/100

10%

LCP (Largest Contentful Paint)

Value17.3 s

0/100

25%

SI (Speed Index)

Value10.3 s

8/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.117

85/100

15%

TTI (Time to Interactive)

Value14.4 s

9/100

10%

Network Requests Diagram

csl.cornell.edu

84 ms

counter_xhtml.js

11 ms

HomeMainCSLHeader.jpg

34 ms

Meyrem%20Teaching%204x2.jpg

53 ms

Cluster%204x2.jpg

50 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that 87% of them (13 requests) were addressed to the original Csl.cornell.edu, 7% (1 request) were made to Statcounter.com and 7% (1 request) were made to C.statcounter.com. The less responsive or slowest element that took the longest time to load (142 ms) relates to the external source C.statcounter.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 40.2 kB (13%)

Content Size

305.9 kB

After Optimization

265.8 kB

In fact, the total size of Csl.cornell.edu main page is 305.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Images take 272.7 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 8.4 kB

  • Original 10.7 kB
  • After minification 9.4 kB
  • After compression 2.3 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 1.3 kB, which is 12% 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 8.4 kB or 78% of the original size.

Image Optimization

-6%

Potential reduce by 16.9 kB

  • Original 272.7 kB
  • After minification 255.7 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. Csl Cornell images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 14.8 kB

  • Original 22.5 kB
  • After minification 22.5 kB
  • After compression 7.7 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 14.8 kB or 66% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

14

After Optimization

14

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Csl Cornell. According to our analytics all requests are already optimized.

Accessibility Review

csl.cornell.edu accessibility score

95

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

Links do not have a discernible name

Best Practices

csl.cornell.edu best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

csl.cornell.edu SEO score

85

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

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Csl.cornell.edu 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 Csl.cornell.edu main page’s claimed encoding is iso-8859-1. 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

Open Graph description is not detected on the main page of Csl Cornell. 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: