Tools & Wizards About Us

Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 78

    SEO

    Google-friendlier than
    39% of websites

zol.com

中关村在线 - 大中华区专业IT网站 - The valuable and professional IT business website in Greater China

Page Load Speed

16.8 sec in total

First Response

654 ms

Resources Loaded

15.2 sec

Page Rendered

964 ms

About Website

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

中国领先的IT信息与商务门户, 包括新闻, 商城, 硬件, 下载, 游戏, 手机, 评测等40个大型频道，每天发布大量各类产品促销信息及文章专题，是IT行业的厂商, 经销商, IT产品, 解决方案的提供场所

Visit zol.com

Key Findings

We analyzed Zol.com page load time and found that the first response time was 654 ms and then it took 16.2 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.

Performance Metrics

zol.com performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value11.0 s

0/100

25%

SI (Speed Index)

Value11.5 s

5/100

10%

TBT (Total Blocking Time)

Value170 ms

93/100

30%

CLS (Cumulative Layout Shift)

Value0.091

92/100

15%

TTI (Time to Interactive)

Value15.3 s

7/100

10%

Network Requests Diagram

zol.com

654 ms

www.zol.com

825 ms

www.zol.com.cn

2460 ms

z.page.index.1.0.0.css

685 ms

appload_inviewclick_PC_homepage_head.png

684 ms

Our browser made a total of 143 requests to load all elements on the main page. We found that 1% of them (2 requests) were addressed to the original Zol.com, 27% (39 requests) were made to Pvnpc.zol.com.cn and 15% (21 requests) were made to Icon.zol-img.com.cn. The less responsive or slowest element that took the longest time to load (2.6 sec) relates to the external source Lupic.cdn.bcebos.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.0 MB (45%)

Content Size

4.4 MB

After Optimization

2.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zol.com main page is 4.4 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 2.3 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 1.9 MB

  • Original 2.1 MB
  • After minification 1.8 MB
  • After compression 190.7 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 329.4 kB, which is 16% 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 1.9 MB or 91% of the original size.

Image Optimization

-4%

Potential reduce by 79.7 kB

  • Original 2.3 MB
  • After minification 2.2 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. Zol images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 399 B

  • Original 20.9 kB
  • After minification 20.9 kB
  • After compression 20.5 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. This website has mostly compressed JavaScripts.

CSS Optimization

-23%

Potential reduce by 3.0 kB

  • Original 13.1 kB
  • After minification 13.1 kB
  • After compression 10.1 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. Zol.com needs all CSS files to be minified and compressed as it can save up to 3.0 kB or 23% of the original size.

Requests Breakdown

Number of requests can be reduced by 63 (45%)

Requests Now

140

After Optimization

77

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 140 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zol. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

zol.com accessibility score

61

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

zol.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

zol.com SEO score

78

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

High

robots.txt is not valid

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

    N/A

  • Language Claimed

    N/A

  • Encoding

    GBK

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zol.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Zol.com main page’s claimed encoding is gbk. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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