Tools & Wizards About Us
duodaa.com screenshot

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

duodaa.com

欢迎来到哆嗒数学网，一个妙趣的数学世界

Page Load Speed

25.6 sec in total

First Response

7.1 sec

Resources Loaded

18.4 sec

Page Rendered

156 ms

duodaa.com screenshot

About Website

Welcome to duodaa.com homepage info - get ready to check Duodaa best content right away, or after learning these important things about duodaa.com

一个交流大学以上数学问题的网站。

Visit duodaa.com

Key Findings

We analyzed Duodaa.com page load time and found that the first response time was 7.1 sec and then it took 18.5 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

duodaa.com performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value10.1 s

0/100

10%

LCP (Largest Contentful Paint)

Value10.2 s

0/100

25%

SI (Speed Index)

Value11.7 s

4/100

10%

TBT (Total Blocking Time)

Value480 ms

60/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value11.6 s

18/100

10%

Network Requests Diagram

duodaa.com

7069 ms

bootstrap.css

2585 ms

icon.css

867 ms

common.css

6629 ms

link.css

2711 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 70% of them (30 requests) were addressed to the original Duodaa.com, 26% (11 requests) were made to Cdn.mathjax.org and 5% (2 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (8.8 sec) belongs to the original domain Duodaa.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 730.7 kB (74%)

Content Size

983.2 kB

After Optimization

252.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Duodaa.com main page is 983.2 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. 40% of websites need less resources to load. Javascripts take 639.7 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 39.1 kB

  • Original 48.1 kB
  • After minification 45.3 kB
  • After compression 9.0 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 39.1 kB or 81% of the original size.

Image Optimization

-17%

Potential reduce by 2.9 kB

  • Original 16.8 kB
  • After minification 13.9 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, Duodaa needs image optimization as it can save up to 2.9 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-72%

Potential reduce by 458.4 kB

  • Original 639.7 kB
  • After minification 608.2 kB
  • After compression 181.4 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 458.4 kB or 72% of the original size.

CSS Optimization

-83%

Potential reduce by 230.3 kB

  • Original 278.6 kB
  • After minification 262.0 kB
  • After compression 48.3 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. Duodaa.com needs all CSS files to be minified and compressed as it can save up to 230.3 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (50%)

Requests Now

36

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Duodaa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

duodaa.com

duodaa.com

7069 ms

bootstrap.css

bootstrap.css

2585 ms

icon.css

icon.css

867 ms

common.css

common.css

6629 ms

link.css

link.css

2711 ms

style.css

style.css

1329 ms

duodaa.css

duodaa.css

2746 ms

jquery.2.js

jquery.2.js

4754 ms

jquery.form.js

jquery.form.js

4891 ms

plug-in_module.js

plug-in_module.js

5427 ms

aws.js

aws.js

8792 ms

aw_template.js

aw_template.js

6658 ms

app.js

app.js

5429 ms

compatibility.js

compatibility.js

5876 ms

MathJax.js

MathJax.js

32 ms

bg.gif

bg.gif

565 ms

default_class_imgs.png

default_class_imgs.png

566 ms

69_avatar_max.jpg

69_avatar_max.jpg

565 ms

avatar-max-img.png

avatar-max-img.png

1004 ms

04_avatar_mid.jpg

04_avatar_mid.jpg

449 ms

73_avatar_max.jpg

73_avatar_max.jpg

1436 ms

23_avatar_mid.jpg

23_avatar_mid.jpg

1106 ms

73_avatar_mid.jpg

73_avatar_mid.jpg

1094 ms

topic-mid-img.png

topic-mid-img.png

1095 ms

30_avatar_mid.jpg

30_avatar_mid.jpg

2991 ms

avatar-mid-img.png

avatar-mid-img.png

1433 ms

29_avatar_mid.jpg

29_avatar_mid.jpg

1628 ms

79_avatar_mid.jpg

79_avatar_mid.jpg

1654 ms

TeX-AMS_HTML.js

TeX-AMS_HTML.js

36 ms

logo.png

logo.png

1627 ms

hm.js

hm.js

798 ms

icomoon.woff

icomoon.woff

2691 ms

duodaa.com

duodaa.com

2863 ms

asciimath2jax.js

asciimath2jax.js

4 ms

extpfeil.js

extpfeil.js

72 ms

AMSsymbols.js

AMSsymbols.js

130 ms

jax.js

jax.js

8 ms

fontdata.js

fontdata.js

10 ms

MathJax_Main-Regular.woff

MathJax_Main-Regular.woff

10 ms

MathJax_Main-Bold.woff

MathJax_Main-Bold.woff

9 ms

MathJax_Math-Italic.woff

MathJax_Math-Italic.woff

4 ms

MathJax_Size1-Regular.woff

MathJax_Size1-Regular.woff

9 ms

hm.gif

hm.gif

399 ms

Accessibility Review

duodaa.com accessibility score

94

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

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

Best Practices

duodaa.com 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

High

Missing source maps for large first-party JavaScript

SEO Factors

duodaa.com SEO score

58

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

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Duodaa.com 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 Duodaa.com 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

duodaa.com

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