Tools & Wizards About Us
col.com screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 49% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 80

    SEO

    Google-friendlier than
    42% of websites

col.com

COL_中文在线

Page Load Speed

11.6 sec in total

First Response

702 ms

Resources Loaded

9.7 sec

Page Rendered

1.2 sec

col.com screenshot

About Website

Visit col.com now to see the best up-to-date COL content for India and also check out these interesting facts you probably never knew about col.com

COL中文在线集团2000年成立于清华大学。2015年1月21日，中文在线在深交所创业板上市，成为中国“数字出版第一股”（股票代码：300364）。中文在线是国内领先的数字文化内容产业集团。以数字内容生产、版权分发、IP 衍生与知识产权保护为核心；以“夯实内容、决胜IP、国际优先、AI赋能”为发展战略，致力于推动科技与文化融合发展。

Visit col.com

Key Findings

We analyzed Col.com page load time and found that the first response time was 702 ms and then it took 10.9 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

col.com performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

31/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.965

2/100

15%

TTI (Time to Interactive)

Value5.4 s

71/100

10%

Network Requests Diagram

col.com

702 ms

col.com

1302 ms

swiper-bundle.min.css

220 ms

index.css

439 ms

css.css

650 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that all of those requests were addressed to Col.com and no external sources were called. The less responsive or slowest element that took the longest time to load (6.3 sec) belongs to the original domain Col.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 470.6 kB (10%)

Content Size

4.6 MB

After Optimization

4.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Col.com main page is 4.6 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. 55% of websites need less resources to load. Images take 4.5 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 75.6 kB

  • Original 87.8 kB
  • After minification 63.7 kB
  • After compression 12.3 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. This page needs HTML code to be minified as it can gain 24.1 kB, which is 27% 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 75.6 kB or 86% of the original size.

Image Optimization

-9%

Potential reduce by 379.5 kB

  • Original 4.5 MB
  • After minification 4.1 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. COL images are well optimized though.

JavaScript Optimization

-13%

Potential reduce by 10.5 kB

  • Original 83.7 kB
  • After minification 83.5 kB
  • After compression 73.2 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 10.5 kB or 13% of the original size.

CSS Optimization

-29%

Potential reduce by 5.1 kB

  • Original 17.3 kB
  • After minification 17.3 kB
  • After compression 12.2 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. Col.com needs all CSS files to be minified and compressed as it can save up to 5.1 kB or 29% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (12%)

Requests Now

57

After Optimization

50

  • Images
  • JavaScript
  • CSS

The browser has sent 57 CSS, Javascripts, AJAX and image requests in order to completely render the main page of COL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

col.com

col.com

702 ms

col.com

col.com

1302 ms

swiper-bundle.min.css

swiper-bundle.min.css

220 ms

index.css

index.css

439 ms

css.css

css.css

650 ms

header.css

header.css

653 ms

fotter.css

fotter.css

655 ms

index.js

index.js

655 ms

jquery.js

jquery.js

873 ms

swiper-bundle.min.js

swiper-bundle.min.js

1100 ms

qlCountUp.js

qlCountUp.js

867 ms

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1084 ms

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221 ms

search.png

search.png

223 ms

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897 ms

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220 ms

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222 ms

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223 ms

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458 ms

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3064 ms

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458 ms

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1326 ms

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457 ms

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1336 ms

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688 ms

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1771 ms

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905 ms

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1117 ms

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1123 ms

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3533 ms

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5028 ms

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1545 ms

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2633 ms

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2632 ms

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3719 ms

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3069 ms

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2852 ms

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3070 ms

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4570 ms

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3289 ms

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3288 ms

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3506 ms

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3507 ms

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3724 ms

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3752 ms

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3941 ms

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1330 ms

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1115 ms

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1118 ms

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1563 ms

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1128 ms

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2141 ms

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4142 ms

bk_about.png

bk_about.png

6324 ms

img_2.png

img_2.png

3975 ms

layout_bk.png

layout_bk.png

3942 ms

img_5.png

img_5.png

4375 ms

bg_1.png

bg_1.png

4159 ms

Accessibility Review

col.com accessibility score

80

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Best Practices

col.com best practices score

83

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

Page has valid source maps

SEO Factors

col.com SEO score

80

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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Col.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it does not match the claimed English language. Our system also found out that Col.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

col.com

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