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rearvisionsystem.en.alibaba.com screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 41

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

rearvisionsystem.en.alibaba.com

Page Load Speed

3.2 sec in total

First Response

472 ms

Resources Loaded

2.5 sec

Page Rendered

273 ms

rearvisionsystem.en.alibaba.com screenshot

About Website

Click here to check amazing Rearvisionsystem En Alibaba content for China. Otherwise, check out these important facts you probably never knew about rearvisionsystem.en.alibaba.com

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Key Findings

We analyzed Rearvisionsystem.en.alibaba.com page load time and found that the first response time was 472 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

rearvisionsystem.en.alibaba.com performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

28/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

45/100

25%

SI (Speed Index)

Value14.1 s

1/100

10%

TBT (Total Blocking Time)

Value13,670 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.051

99/100

15%

TTI (Time to Interactive)

Value29.3 s

0/100

10%

Network Requests Diagram

rearvisionsystem.en.alibaba.com

472 ms

rearvisionsystem.en.alibaba.com

460 ms

52 ms

O1CN0153JdbU26g4bILVOyC_!!6000000007690-2-tps-418-58.png

69 ms

index.js

82 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Rearvisionsystem.en.alibaba.com, 24% (10 requests) were made to S.alicdn.com and 22% (9 requests) were made to Sc01.alicdn.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Sc02.alicdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (51%)

Content Size

2.0 MB

After Optimization

994.5 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Rearvisionsystem.en.alibaba.com main page is 2.0 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. 70% of websites need less resources to load. Javascripts take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 510.3 kB

  • Original 611.3 kB
  • After minification 610.5 kB
  • After compression 101.0 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 510.3 kB or 83% of the original size.

Image Optimization

-1%

Potential reduce by 38 B

  • Original 6.2 kB
  • After minification 6.2 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. Rearvisionsystem En Alibaba images are well optimized though.

JavaScript Optimization

-37%

Potential reduce by 523.7 kB

  • Original 1.4 MB
  • After minification 1.4 MB
  • After compression 887.4 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 523.7 kB or 37% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (44%)

Requests Now

39

After Optimization

22

  • AJAX
  • Images
  • JavaScript

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rearvisionsystem En Alibaba. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

rearvisionsystem.en.alibaba.com

rearvisionsystem.en.alibaba.com

472 ms

rearvisionsystem.en.alibaba.com

rearvisionsystem.en.alibaba.com

460 ms

52 ms

O1CN0153JdbU26g4bILVOyC_!!6000000007690-2-tps-418-58.png

O1CN0153JdbU26g4bILVOyC_!!6000000007690-2-tps-418-58.png

69 ms

index.js

index.js

82 ms

index.js

index.js

70 ms

renderHeader.js

renderHeader.js

70 ms

awsc.js

awsc.js

57 ms

14 ms

7.gif

7.gif

25 ms

et_f.js

et_f.js

40 ms

um.js

um.js

153 ms

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H89ab1cb24050419a8becfd5a8864a07cZ.jpg

610 ms

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H4aafa135bde84416a645c25d45736206x.jpg

436 ms

O1CN011Mw7laDzdcb8D8W_!!3377521498.png

O1CN011Mw7laDzdcb8D8W_!!3377521498.png

118 ms

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HTB1OgD2XlnTBKNjSZPfq6zf1XXaY.jpg

589 ms

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H03b7b3e8ca724c88b79ee342a4eeb0bbu.jpg

794 ms

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HTB1Ng5CXQyWBuNjy0Fpq6yssXXaA.jpg

350 ms

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HTB19sCFXKuSBuNjy1Xcq6AYjFXaL.jpg

511 ms

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HTB1QDCEXKuSBuNjSsziq6zq8pXas.jpg

368 ms

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HTB1CufZXfImBKNjSZFlq6A43FXat.jpg

506 ms

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HTB1o4j2XlnTBKNjSZPfq6zf1XXae.jpg

415 ms

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HTB1qtGFXKuSBuNjy1Xcq6AYjFXaK.jpg

628 ms

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HTB1_UQBXfiSBuNkSnhJq6zDcpXaC.jpg

650 ms

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HTB1H2OEXL5TBuNjSspmq6yDRVXan.jpg

669 ms

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H54356b375799459d9320759a7e4b5874d.jpg

384 ms

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H3a6a740283414327b80f23361ae9c8a42.jpg

444 ms

Vertical-Split-15-88-Inch-Side-View.jpg_350x350.jpg

Vertical-Split-15-88-Inch-Side-View.jpg_350x350.jpg

288 ms

10-Inch-BSD-Monitor-4-Ch-Camara.jpg_350x350.jpg

10-Inch-BSD-Monitor-4-Ch-Camara.jpg_350x350.jpg

753 ms

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H52a905ab927e4322ada1adb214b5db1ci.jpg

795 ms

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682 ms

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380 ms

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681 ms

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HTB1OEexXFmWBuNjSspdq6zugXXa4.jpg

576 ms

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HTB1bo5zXHuWBuNjSszgq6z8jVXaV.jpg

390 ms

H3b5993d94c2449f4a7764aacab32d29ec.jpg

H3b5993d94c2449f4a7764aacab32d29ec.jpg

1212 ms

wu.json

wu.json

51 ms

um.json

um.json

52 ms

getUmid.do

getUmid.do

31 ms

eg.js

eg.js

3 ms

index.js

index.js

3 ms

Accessibility Review

rearvisionsystem.en.alibaba.com accessibility score

41

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

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

rearvisionsystem.en.alibaba.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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

rearvisionsystem.en.alibaba.com SEO score

79

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rearvisionsystem.en.alibaba.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Rearvisionsystem.en.alibaba.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

rearvisionsystem.en.alibaba.com

Open Graph data is detected on the main page of Rearvisionsystem En Alibaba. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: