Tools & Wizards About Us
d3f.com screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 46

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

d3f.com

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Page Load Speed

11.8 sec in total

First Response

1.2 sec

Resources Loaded

10.2 sec

Page Rendered

400 ms

d3f.com screenshot

About Website

Welcome to d3f.com homepage info - get ready to check D 3 F best content for China right away, or after learning these important things about d3f.com

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Visit d3f.com

Key Findings

We analyzed D3f.com page load time and found that the first response time was 1.2 sec and then it took 10.6 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

d3f.com performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

12/100

10%

LCP (Largest Contentful Paint)

Value7.7 s

3/100

25%

SI (Speed Index)

Value12.6 s

3/100

10%

TBT (Total Blocking Time)

Value800 ms

36/100

30%

CLS (Cumulative Layout Shift)

Value1.525

0/100

15%

TTI (Time to Interactive)

Value9.0 s

34/100

10%

Network Requests Diagram

d3f.com

1191 ms

yunu.css

1061 ms

jquery-1.12.4.min.js

1893 ms

mk.js

1060 ms

jquery.lazyload.min.js

667 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 67% of them (31 requests) were addressed to the original D3f.com, 24% (11 requests) were made to Api.map.baidu.com and 4% (2 requests) were made to Online1.map.bdimg.com. The less responsive or slowest element that took the longest time to load (5.5 sec) belongs to the original domain D3f.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 82.4 kB (8%)

Content Size

1.0 MB

After Optimization

938.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of D3f.com main page is 1.0 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. 25% of websites need less resources to load. Images take 879.1 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 70.4 kB

  • Original 79.9 kB
  • After minification 52.0 kB
  • After compression 9.5 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 27.9 kB, which is 35% 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 70.4 kB or 88% of the original size.

Image Optimization

-1%

Potential reduce by 11.3 kB

  • Original 879.1 kB
  • After minification 867.7 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. D 3 F images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 12 B

  • Original 52.8 kB
  • After minification 52.8 kB
  • After compression 52.8 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

-7%

Potential reduce by 690 B

  • Original 9.3 kB
  • After minification 9.3 kB
  • After compression 8.6 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. D3f.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 16 (36%)

Requests Now

44

After Optimization

28

  • Images
  • JavaScript
  • CSS

The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of D 3 F. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

d3f.com

d3f.com

1191 ms

yunu.css

yunu.css

1061 ms

jquery-1.12.4.min.js

jquery-1.12.4.min.js

1893 ms

mk.js

mk.js

1060 ms

jquery.lazyload.min.js

jquery.lazyload.min.js

667 ms

idangerous.swiper.css

idangerous.swiper.css

668 ms

idangerous.swiper.min.js

idangerous.swiper.min.js

636 ms

api

api

906 ms

headbg.jpg

headbg.jpg

650 ms

939184eaf6ff90b84b56f5b118418ecd.jpg

939184eaf6ff90b84b56f5b118418ecd.jpg

1505 ms

ren.png

ren.png

233 ms

eb242765015da7ac79987234e12b2d3c.jpg

eb242765015da7ac79987234e12b2d3c.jpg

3372 ms

a01b7740cb8c75cff837c8a8baad3c3e.jpg

a01b7740cb8c75cff837c8a8baad3c3e.jpg

4093 ms

jb.png

jb.png

1276 ms

fff.png

fff.png

451 ms

dz.png

dz.png

669 ms

sj.png

sj.png

878 ms

yx.png

yx.png

912 ms

ed186b084c759026075d3fd2d1a9fa7a.jpg

ed186b084c759026075d3fd2d1a9fa7a.jpg

4865 ms

aboutbg.jpg

aboutbg.jpg

1071 ms

tit.png

tit.png

1282 ms

img2.png

img2.png

1424 ms

bgcase.jpg

bgcase.jpg

1477 ms

more.png

more.png

1617 ms

getscript

getscript

696 ms

bmap.css

bmap.css

454 ms

bg.png

bg.png

234 ms

919 ms

959 ms

927 ms

dian.png

dian.png

897 ms

foot.gif

foot.gif

953 ms

1160 ms

blank.gif

blank.gif

244 ms

openhand.cur

openhand.cur

425 ms

mapctrls.gif

mapctrls.gif

459 ms

copyright_logo.png

copyright_logo.png

462 ms

88.png

88.png

1046 ms

c7f18dab1190df1cf980c498110e2979.jpg

c7f18dab1190df1cf980c498110e2979.jpg

1069 ms

b512049da25f5c8df09f35cab84f0f06.jpg

b512049da25f5c8df09f35cab84f0f06.jpg

5521 ms

d13348e97ba0a806c334ecf159b37f07.jpg

d13348e97ba0a806c334ecf159b37f07.jpg

2143 ms

f6d817354d2ab7fe092394add5242329.jpg

f6d817354d2ab7fe092394add5242329.jpg

2159 ms

d5aa342a58ba4d448226dc1d71db7a08.jpg

d5aa342a58ba4d448226dc1d71db7a08.jpg

2365 ms

getmodules

getmodules

428 ms

blank.gif

blank.gif

427 ms

blank.gif

blank.gif

241 ms

Accessibility Review

d3f.com accessibility score

46

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

Links do not have a discernible name

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

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

d3f.com 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

d3f.com SEO score

79

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

    ZH

  • Language Claimed

    ZH

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise D3f.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 D3f.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

d3f.com

Open Graph description is not detected on the main page of D 3 F. 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: