Tools & Wizards About Us
4399.cn screenshot

Report Summary

  • 41

    Performance

    Renders faster than
    60% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

4399.cn

手机游戏_4399手机游戏网_手游排行榜2025_手机游戏下载-www.4399.cn

Page Load Speed

17.8 sec in total

First Response

3.8 sec

Resources Loaded

13.5 sec

Page Rendered

522 ms

4399.cn screenshot

About Website

Welcome to 4399.cn homepage info - get ready to check 4399 best content for China right away, or after learning these important things about 4399.cn

4399手机游戏网，致力于成为可信赖的手机游戏媒体，为您提供海量精品游戏免费下载，前沿手游资讯报道，实用视频攻略秘籍，新热好玩的安卓游戏推荐，手机游戏排行榜2025前十名。

Visit 4399.cn

Key Findings

We analyzed 4399.cn page load time and found that the first response time was 3.8 sec and then it took 14 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

4399.cn performance score

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

19/100

10%

LCP (Largest Contentful Paint)

Value6.8 s

7/100

25%

SI (Speed Index)

Value5.6 s

53/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.85

4/100

15%

TTI (Time to Interactive)

Value11.4 s

19/100

10%

Network Requests Diagram

www.4399.cn

3786 ms

1525 ms

sea.js

1058 ms

config.js

1056 ms

heatmap.js

1055 ms

Our browser made a total of 121 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original 4399.cn, 77% (93 requests) were made to F1.img4399.com and 17% (21 requests) were made to M.img4399.com. The less responsive or slowest element that took the longest time to load (3.8 sec) belongs to the original domain 4399.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 277.7 kB (13%)

Content Size

2.1 MB

After Optimization

1.9 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of 4399.cn main page is 2.1 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. 65% of websites need less resources to load. Images take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 135.2 kB

  • Original 164.5 kB
  • After minification 154.5 kB
  • After compression 29.3 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 135.2 kB or 82% of the original size.

Image Optimization

-3%

Potential reduce by 56.7 kB

  • Original 1.8 MB
  • After minification 1.8 MB

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. 4399 images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 85.8 kB

  • Original 131.7 kB
  • After minification 125.8 kB
  • After compression 45.9 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 85.8 kB or 65% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (11%)

Requests Now

120

After Optimization

107

  • Images
  • JavaScript
  • CSS

The browser has sent 120 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 4399. 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 as a result speed up the page load time.

Network Requests Diagram

www.4399.cn

www.4399.cn

3786 ms

1525 ms

sea.js

sea.js

1058 ms

config.js

config.js

1056 ms

heatmap.js

heatmap.js

1055 ms

m.js

m.js

1058 ms

trace_news.js

trace_news.js

2474 ms

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58 ms

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60 ms

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60 ms

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475 ms

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7 ms

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hm.js

3647 ms

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4 ms

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4 ms

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12 ms

ks.lazyimg.min.js

ks.lazyimg.min.js

11 ms

ks.gototop.min.js

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12 ms

ks.autocomplete.min.js

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7 ms

ks.favorites.min.js

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6 ms

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1065 ms

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1311 ms

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969 ms

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Accessibility Review

4399.cn accessibility score

56

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.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

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

Image elements do not have [alt] attributes

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

4399.cn 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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

4399.cn SEO score

75

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

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 4399.cn 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 4399.cn 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

4399.cn

Open Graph description is not detected on the main page of 4399. 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: