Report Summary

  • 67

    Performance

    Renders faster than
    79% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 49% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

linux.cn

Linux 中国◆开源社区

Page Load Speed

5.1 sec in total

First Response

529 ms

Resources Loaded

4.1 sec

Page Rendered

491 ms

linux.cn screenshot

About Website

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

Linux中国是一家创立于2003年的国内开源社区,主要关注方向在 Linux 推广、Linux 技术研究、Linux 业界事件的传播。Linux 中国包括网站、微博、微信和邮件列表等平台。

Visit linux.cn

Key Findings

We analyzed Linux.cn page load time and found that the first response time was 529 ms and then it took 4.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

linux.cn performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

54/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

52/100

25%

SI (Speed Index)

Value6.8 s

35/100

10%

TBT (Total Blocking Time)

Value390 ms

69/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.3 s

94/100

10%

Network Requests Diagram

linux.cn

529 ms

linux.cn

1097 ms

style_1_common.css

1187 ms

responsive.css

1195 ms

common.js

1428 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 6% of them (2 requests) were addressed to the original Linux.cn, 94% (31 requests) were made to Img.linux.net.cn. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Img.linux.net.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 74.7 kB (23%)

Content Size

331.9 kB

After Optimization

257.2 kB

In fact, the total size of Linux.cn main page is 331.9 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 165.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 51.2 kB

  • Original 66.2 kB
  • After minification 65.1 kB
  • After compression 15.0 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 51.2 kB or 77% of the original size.

Image Optimization

-10%

Potential reduce by 16.4 kB

  • Original 165.6 kB
  • After minification 149.2 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. Linux images are well optimized though.

JavaScript Optimization

-6%

Potential reduce by 4.1 kB

  • Original 72.4 kB
  • After minification 72.3 kB
  • After compression 68.3 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 3.1 kB

  • Original 27.8 kB
  • After minification 27.8 kB
  • After compression 24.7 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. Linux.cn needs all CSS files to be minified and compressed as it can save up to 3.1 kB or 11% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (55%)

Requests Now

31

After Optimization

14

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Linux. 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.

Accessibility Review

linux.cn accessibility score

80

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

linux.cn best practices score

58

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

SEO Factors

linux.cn SEO score

93

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

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 Linux.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 Linux.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

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