Tools & Wizards About Us
cennavi.com.cn screenshot

Report Summary

  • 45

    Performance

    Renders faster than
    64% of other websites

  • 46

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 73

    SEO

    Google-friendlier than
    31% of websites

cennavi.com.cn

MineData-世纪高通

Page Load Speed

16.4 sec in total

First Response

3.1 sec

Resources Loaded

13 sec

Page Rendered

369 ms

cennavi.com.cn screenshot

About Website

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

北京世纪高通科技有限公司,是一家拥有海量、多源位置大数据，构建了权威的全国位置数据仓库的公司，主要应用于政企、汽车厂商、互联网、交通以及物流等相关领域。公司聚焦于数据、算法和服务，可提供企业级位置智能方案，每天服务亿万用户，服务范围覆盖全国。

Visit cennavi.com.cn

Key Findings

We analyzed Cennavi.com.cn page load time and found that the first response time was 3.1 sec and then it took 13.3 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

cennavi.com.cn performance score

45

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value14.4 s

0/100

25%

SI (Speed Index)

Value9.5 s

12/100

10%

TBT (Total Blocking Time)

Value110 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.547

13/100

15%

TTI (Time to Interactive)

Value4.7 s

80/100

10%

Network Requests Diagram

cennavi.com.cn

3072 ms

cennavi.com.cn

1386 ms

reset.css

646 ms

animate.css

1062 ms

jquery.running.css

848 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that all of those requests were addressed to Cennavi.com.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (5.1 sec) belongs to the original domain Cennavi.com.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 659.1 kB (20%)

Content Size

3.2 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cennavi.com.cn main page is 3.2 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. 50% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 70.1 kB

  • Original 79.1 kB
  • After minification 43.9 kB
  • After compression 9.1 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 35.3 kB, which is 45% 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 70.1 kB or 89% of the original size.

Image Optimization

-9%

Potential reduce by 255.4 kB

  • Original 2.7 MB
  • After minification 2.5 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. Cennavi images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 162.8 kB

  • Original 232.5 kB
  • After minification 226.5 kB
  • After compression 69.7 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 162.8 kB or 70% of the original size.

CSS Optimization

-88%

Potential reduce by 170.8 kB

  • Original 194.8 kB
  • After minification 124.0 kB
  • After compression 24.0 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. Cennavi.com.cn needs all CSS files to be minified and compressed as it can save up to 170.8 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (27%)

Requests Now

83

After Optimization

61

  • Images
  • JavaScript
  • CSS

The browser has sent 83 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cennavi. 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 from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

cennavi.com.cn

cennavi.com.cn

3072 ms

cennavi.com.cn

cennavi.com.cn

1386 ms

reset.css

reset.css

646 ms

animate.css

animate.css

1062 ms

jquery.running.css

jquery.running.css

848 ms

owl.carousel.css

owl.carousel.css

852 ms

owl.theme.default.min.css

owl.theme.default.min.css

851 ms

main.css

main.css

1163 ms

idangerous.swiper.css

idangerous.swiper.css

965 ms

media.css

media.css

1589 ms

less.css

less.css

2060 ms

jquery.min.js

jquery.min.js

1477 ms

owl.carousel.min.js

owl.carousel.min.js

1016 ms

wow.min.js

wow.min.js

840 ms

jquery.running.min.js

jquery.running.min.js

982 ms

layer.js

layer.js

1564 ms

common.js

common.js

1218 ms

idangerous.swiper.min.js

idangerous.swiper.min.js

1260 ms

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640 ms

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646 ms

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647 ms

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648 ms

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856 ms

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864 ms

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1065 ms

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1247 ms

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1479 ms

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1489 ms

layer.css

layer.css

1473 ms

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1538 ms

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1892 ms

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1469 ms

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1330 ms

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1453 ms

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1518 ms

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1523 ms

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1355 ms

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1373 ms

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1473 ms

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1471 ms

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1857 ms

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4046 ms

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5115 ms

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1636 ms

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1228 ms

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1027 ms

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1231 ms

Accessibility Review

cennavi.com.cn accessibility score

46

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.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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.

Best Practices

cennavi.com.cn best practices score

67

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

cennavi.com.cn SEO score

73

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cennavi.com.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 Cennavi.com.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

cennavi.com.cn

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