Tools & Wizards About Us
pd521.com screenshot

Report Summary

  • 88

    Performance

    Renders faster than
    90% of other websites

  • 66

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

pd521.com

逆向未来 - Powered by Discuz!

Page Load Speed

48.7 sec in total

First Response

2.7 sec

Resources Loaded

45.2 sec

Page Rendered

782 ms

pd521.com screenshot

About Website

Click here to check amazing Pd 521 content for China. Otherwise, check out these important facts you probably never knew about pd521.com

逆向未来技术社区专注于Android安全、IOS安全等移动安全领域，我们会竭尽所能为志同道合的朋友提供一个学习交流的纯净社区！

Visit pd521.com

Key Findings

We analyzed Pd521.com page load time and found that the first response time was 2.7 sec and then it took 46 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. Unfortunately, there were 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

pd521.com performance score

88

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

64/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

88/100

25%

SI (Speed Index)

Value6.0 s

47/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value2.6 s

98/100

10%

Network Requests Diagram

www.pd521.com

2691 ms

style_5_common.css

15278 ms

style_5_portal_index.css

966 ms

common.js

14499 ms

portal.js

1584 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 84% of them (37 requests) were addressed to the original Pd521.com, 2% (1 request) were made to Discuz.gtimg.cn and 2% (1 request) were made to Cdnjs.touclick.com. The less responsive or slowest element that took the longest time to load (20.4 sec) belongs to the original domain Pd521.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 79.4 kB (44%)

Content Size

182.2 kB

After Optimization

102.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Pd521.com main page is 182.2 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. 20% of websites need less resources to load. Images take 89.2 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 55.6 kB

  • Original 65.4 kB
  • After minification 59.2 kB
  • After compression 9.8 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 55.6 kB or 85% of the original size.

Image Optimization

-8%

Potential reduce by 6.8 kB

  • Original 89.2 kB
  • After minification 82.4 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. Pd 521 images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 17.0 kB

  • Original 27.5 kB
  • After minification 26.7 kB
  • After compression 10.5 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 17.0 kB or 62% of the original size.

CSS Optimization

-15%

Potential reduce by 15 B

  • Original 102 B
  • After minification 98 B
  • After compression 87 B

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. Pd521.com needs all CSS files to be minified and compressed as it can save up to 15 B or 15% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (38%)

Requests Now

40

After Optimization

25

  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Pd 521. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

www.pd521.com

www.pd521.com

2691 ms

style_5_common.css

style_5_common.css

15278 ms

style_5_portal_index.css

style_5_portal_index.css

966 ms

common.js

common.js

14499 ms

portal.js

portal.js

1584 ms

comiis_nv.js

comiis_nv.js

14988 ms

jquery.min.js

jquery.min.js

10589 ms

xmSlide.js

xmSlide.js

5713 ms

discuz_tips.js

discuz_tips.js

1732 ms

c11cd5c9-c960-4c53-b369-85962db820f2.js

c11cd5c9-c960-4c53-b369-85962db820f2.js

1719 ms

nv.png

nv.png

942 ms

qq_login.gif

qq_login.gif

2372 ms

nv_a.png

nv_a.png

1032 ms

comiis_mini_logo.png

comiis_mini_logo.png

1825 ms

avatar.php

avatar.php

20360 ms

comiis_dico01.jpg

comiis_dico01.jpg

9838 ms

comiis_dico02.jpg

comiis_dico02.jpg

8324 ms

comiis_dlogo.jpg

comiis_dlogo.jpg

20348 ms

security.png

security.png

11932 ms

comiis_izbox_listbg.gif

comiis_izbox_listbg.gif

10586 ms

comiis_ftico.gif

comiis_ftico.gif

11518 ms

z_stat.php

z_stat.php

3477 ms

73_avatar_middle.jpg

73_avatar_middle.jpg

15260 ms

10_avatar_middle.jpg

10_avatar_middle.jpg

10415 ms

68_avatar_middle.jpg

68_avatar_middle.jpg

10055 ms

82_avatar_middle.jpg

82_avatar_middle.jpg

13427 ms

93_avatar_middle.jpg

93_avatar_middle.jpg

10647 ms

stat.htm

stat.htm

261 ms

core.php

core.php

1587 ms

41_avatar_middle.jpg

41_avatar_middle.jpg

13775 ms

10_avatar_middle.jpg

10_avatar_middle.jpg

11304 ms

56_avatar_middle.jpg

56_avatar_middle.jpg

12087 ms

87_avatar_middle.jpg

87_avatar_middle.jpg

12333 ms

9.gif

9.gif

1106 ms

scrolltop.png

scrolltop.png

12446 ms

03_avatar_middle.jpg

03_avatar_middle.jpg

14679 ms

90_avatar_middle.jpg

90_avatar_middle.jpg

12835 ms

09_avatar_middle.jpg

09_avatar_middle.jpg

15568 ms

app.gif

app.gif

916 ms

05_avatar_middle.jpg

05_avatar_middle.jpg

12926 ms

02_avatar_middle.jpg

02_avatar_middle.jpg

13207 ms

05_avatar_middle.jpg

05_avatar_middle.jpg

14204 ms

18_avatar_middle.jpg

18_avatar_middle.jpg

15882 ms

38_avatar_middle.jpg

38_avatar_middle.jpg

8595 ms

Accessibility Review

pd521.com accessibility score

66

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

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

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

pd521.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

SEO Factors

pd521.com SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Pd521.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 Pd521.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

pd521.com

Open Graph description is not detected on the main page of Pd 521. 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: