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ddd.princeton.edu screenshot

Report Summary

  • 71

    Performance

    Renders faster than
    82% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

ddd.princeton.edu

der | die | das

Page Load Speed

1.1 sec in total

First Response

48 ms

Resources Loaded

905 ms

Page Rendered

173 ms

ddd.princeton.edu screenshot

About Website

Click here to check amazing Ddd Princeton content for United States. Otherwise, check out these important facts you probably never knew about ddd.princeton.edu

Visit ddd.princeton.edu

Key Findings

We analyzed Ddd.princeton.edu page load time and found that the first response time was 48 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

ddd.princeton.edu performance score

71

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

33/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

26/100

25%

SI (Speed Index)

Value4.0 s

81/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.079

94/100

15%

TTI (Time to Interactive)

Value3.6 s

92/100

10%

Network Requests Diagram

ddd.princeton.edu

48 ms

dddgerman.org

236 ms

main.css

34 ms

lock-7.12.min.js

80 ms

lib.js

60 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that 7% of them (1 request) were addressed to the original Ddd.princeton.edu, 87% (13 requests) were made to Dddgerman.org and 7% (1 request) were made to Cdn.auth0.com. The less responsive or slowest element that took the longest time to load (236 ms) relates to the external source Dddgerman.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.1 MB (79%)

Content Size

2.6 MB

After Optimization

553.8 kB

  • HTML
  • JavaScript

In fact, the total size of Ddd.princeton.edu main page is 2.6 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. 55% of websites need less resources to load. Javascripts take 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 225.5 kB

  • Original 267.3 kB
  • After minification 267.1 kB
  • After compression 41.8 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 225.5 kB or 84% of the original size.

JavaScript Optimization

-78%

Potential reduce by 1.8 MB

  • Original 2.4 MB
  • After minification 2.0 MB
  • After compression 511.9 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 1.8 MB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (85%)

Requests Now

13

After Optimization

2

  • JavaScript
  • CSS

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ddd Princeton. 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 as a result speed up the page load time.

Network Requests Diagram

ddd.princeton.edu

ddd.princeton.edu

48 ms

dddgerman.org

dddgerman.org

236 ms

main.css

main.css

34 ms

lock-7.12.min.js

lock-7.12.min.js

80 ms

lib.js

lib.js

60 ms

main.js

main.js

182 ms

smooth-scroll.js

smooth-scroll.js

68 ms

jquery-2.1.4.min.js

jquery-2.1.4.min.js

73 ms

jquery-ui.js

jquery-ui.js

178 ms

slider.min.js

slider.min.js

71 ms

jquery.mobile.custom.min.js

jquery.mobile.custom.min.js

175 ms

easyResponsiveTabs.js

easyResponsiveTabs.js

175 ms

audio.js

audio.js

175 ms

bootstrap.min.js

bootstrap.min.js

175 ms

ace.js

ace.js

176 ms

Accessibility Review

ddd.princeton.edu accessibility score

80

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

ddd.princeton.edu best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

ddd.princeton.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

robots.txt is not valid

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

    N/A

  • 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 Ddd.princeton.edu can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Ddd.princeton.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

ddd.princeton.edu

Open Graph description is not detected on the main page of Ddd Princeton. 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: