Report Summary

  • 4

    Performance

    Renders faster than
    20% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

vipshop.com

唯品会(vip.com)-5.1欢乐购

Page Load Speed

13.8 sec in total

First Response

654 ms

Resources Loaded

12.3 sec

Page Rendered

911 ms

vipshop.com screenshot

About Website

Visit vipshop.com now to see the best up-to-date Vip Shop content for China and also check out these interesting facts you probably never knew about vipshop.com

Visit vipshop.com

Key Findings

We analyzed Vipshop.com page load time and found that the first response time was 654 ms and then it took 13.2 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

vipshop.com performance score

4

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value21.5 s

0/100

25%

SI (Speed Index)

Value19.9 s

0/100

10%

TBT (Total Blocking Time)

Value5,060 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.421

23/100

15%

TTI (Time to Interactive)

Value22.3 s

1/100

10%

Network Requests Diagram

vipshop.com

654 ms

vipshop.com

853 ms

www.vip.com

2476 ms

es6-shim.min.js

1765 ms

es6-sham.min.js

1750 ms

Our browser made a total of 92 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Vipshop.com, 34% (31 requests) were made to H2.appsimg.com and 13% (12 requests) were made to Mar.vip.com. The less responsive or slowest element that took the longest time to load (2.7 sec) relates to the external source Mapi.vip.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 476.5 kB (21%)

Content Size

2.2 MB

After Optimization

1.7 MB

In fact, the total size of Vipshop.com main page is 2.2 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. 55% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 430.9 kB

  • Original 542.7 kB
  • After minification 532.8 kB
  • After compression 111.8 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 430.9 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 14.2 kB

  • Original 1.2 MB
  • After minification 1.2 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. Vip Shop images are well optimized though.

JavaScript Optimization

-6%

Potential reduce by 27.0 kB

  • Original 416.5 kB
  • After minification 416.5 kB
  • After compression 389.5 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

-17%

Potential reduce by 4.4 kB

  • Original 25.7 kB
  • After minification 25.7 kB
  • After compression 21.3 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. Vipshop.com needs all CSS files to be minified and compressed as it can save up to 4.4 kB or 17% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (27%)

Requests Now

89

After Optimization

65

The browser has sent 89 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vip Shop. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

vipshop.com accessibility score

77

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.

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

vipshop.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

vipshop.com SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

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

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