Tools & Wizards About Us
zztuku.com screenshot

Report Summary

  • 60

    Performance

    Renders faster than
    75% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

zztuku.com

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Page Load Speed

12.1 sec in total

First Response

731 ms

Resources Loaded

10.6 sec

Page Rendered

734 ms

zztuku.com screenshot

About Website

Click here to check amazing Zztuku content for China. Otherwise, check out these important facts you probably never knew about zztuku.com

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Visit zztuku.com

Key Findings

We analyzed Zztuku.com page load time and found that the first response time was 731 ms and then it took 11.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

zztuku.com performance score

60

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value4.8 s

31/100

25%

SI (Speed Index)

Value7.6 s

26/100

10%

TBT (Total Blocking Time)

Value180 ms

92/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.4 s

60/100

10%

Network Requests Diagram

zztuku.com

731 ms

zztuku.com

1004 ms

www.zztuku.com

1770 ms

notiflix.min.css

249 ms

app.css

503 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 50% of them (29 requests) were addressed to the original Zztuku.com, 21% (12 requests) were made to Lupic.cdn.bcebos.com and 5% (3 requests) were made to Pos.baidu.com. The less responsive or slowest element that took the longest time to load (4.9 sec) belongs to the original domain Zztuku.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 124.8 kB (18%)

Content Size

679.2 kB

After Optimization

554.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zztuku.com main page is 679.2 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. 35% of websites need less resources to load. Images take 524.1 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 85.0 kB

  • Original 100.3 kB
  • After minification 100.3 kB
  • After compression 15.3 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. 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 85.0 kB or 85% of the original size.

Image Optimization

-7%

Potential reduce by 34.7 kB

  • Original 524.1 kB
  • After minification 489.4 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. Zztuku images are well optimized though.

JavaScript Optimization

-8%

Potential reduce by 2.5 kB

  • Original 29.9 kB
  • After minification 29.9 kB
  • After compression 27.4 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. This website has mostly compressed JavaScripts.

CSS Optimization

-11%

Potential reduce by 2.7 kB

  • Original 24.9 kB
  • After minification 24.9 kB
  • After compression 22.2 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. Zztuku.com needs all CSS files to be minified and compressed as it can save up to 2.7 kB or 11% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (23%)

Requests Now

52

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zztuku. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zztuku.com

zztuku.com

731 ms

zztuku.com

zztuku.com

1004 ms

www.zztuku.com

www.zztuku.com

1770 ms

notiflix.min.css

notiflix.min.css

249 ms

app.css

app.css

503 ms

logo.png

logo.png

735 ms

O5oGgU.gif

O5oGgU.gif

1150 ms

jquery.min.js

jquery.min.js

646 ms

jquery.lazyload.min.js

jquery.lazyload.min.js

733 ms

wordbox.js

wordbox.js

730 ms

notiflix.min.js

notiflix.min.js

743 ms

app.js

app.js

747 ms

11.0.1.js

11.0.1.js

947 ms

cm.js

cm.js

1612 ms

657d4af4a6279.gif

657d4af4a6279.gif

4704 ms

603e15d5663dc.jpg

603e15d5663dc.jpg

2734 ms

zip.png

zip.png

974 ms

avatar.png

avatar.png

444 ms

bg-container.png

bg-container.png

453 ms

bg-space.png

bg-space.png

456 ms

bg-mountain-1.png

bg-mountain-1.png

4921 ms

bg-mountain-2.png

bg-mountain-2.png

1246 ms

bg-mountain-3.png

bg-mountain-3.png

1678 ms

bear.png

bear.png

703 ms

moban.png

moban.png

1741 ms

code.png

code.png

1740 ms

title.png

title.png

1925 ms

sucai.png

sucai.png

1987 ms

ppt.png

ppt.png

1988 ms

course.png

course.png

2171 ms

soft.png

soft.png

2234 ms

wechat.jpg

wechat.jpg

2975 ms

iconfont.woff

iconfont.woff

3534 ms

hm.js

hm.js

954 ms

ab77b6ea7f3fbf79.js

ab77b6ea7f3fbf79.js

468 ms

O5oGgU.gif

O5oGgU.gif

1340 ms

push.js

push.js

484 ms

b9e85a0000e7424a98d59ebc466cbd63.gif

b9e85a0000e7424a98d59ebc466cbd63.gif

1358 ms

ncpm

ncpm

1156 ms

hm.gif

hm.gif

284 ms

ncpm

ncpm

470 ms

logo-sm.css

logo-sm.css

1304 ms

logo.js

logo.js

1316 ms

adx.php

adx.php

1201 ms

3087011384_14_600_429.jpg

3087011384_14_600_429.jpg

1297 ms

3026766471_14_744_531.jpg

3026766471_14_744_531.jpg

1504 ms

3087285567_14_471_336.jpg

3087285567_14_471_336.jpg

1723 ms

3087638987_14_600_429.jpg

3087638987_14_600_429.jpg

1943 ms

10505560_14.jpg

10505560_14.jpg

1942 ms

2006904312_14.jpg

2006904312_14.jpg

1968 ms

3087607747_14_600_429.jpg

3087607747_14_600_429.jpg

1979 ms

3086844590_14_600_423.jpg

3086844590_14_600_423.jpg

1986 ms

3086890769_14_600_429.jpg

3086890769_14_600_429.jpg

1989 ms

3089182070_14_1024_732.jpg

3089182070_14_1024_732.jpg

2192 ms

3087198137_14_600_429.jpg

3087198137_14_600_429.jpg

2162 ms

3087486381_14_600_429.jpg

3087486381_14_600_429.jpg

2195 ms

se.jpg

se.jpg

1093 ms

auto_dup

auto_dup

248 ms

Accessibility Review

zztuku.com accessibility score

84

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.

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

zztuku.com best practices score

67

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

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

zztuku.com SEO score

93

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

    ZH

  • Language Claimed

    ZH

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zztuku.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it matches the claimed language. Our system also found out that Zztuku.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

zztuku.com

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