Tools & Wizards About Us
zcoptical.en.alibaba.com screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

zcoptical.en.alibaba.com

Company Overview - Wenzhou Zhi Cheng Optical Mfy Co., Ltd.

Page Load Speed

7.3 sec in total

First Response

10 ms

Resources Loaded

6.8 sec

Page Rendered

478 ms

zcoptical.en.alibaba.com screenshot

About Website

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

Wenzhou Zhi Cheng Optical Mfy Co., Ltd. Products:Optical Frames, Reading Glasses, Sunglasses, Blue Light Glasses

Visit zcoptical.en.alibaba.com

Key Findings

We analyzed Zcoptical.en.alibaba.com page load time and found that the first response time was 10 ms and then it took 7.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

zcoptical.en.alibaba.com performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

47/100

10%

LCP (Largest Contentful Paint)

Value18.3 s

0/100

25%

SI (Speed Index)

Value14.7 s

1/100

10%

TBT (Total Blocking Time)

Value10,170 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.064

97/100

15%

TTI (Time to Interactive)

Value31.3 s

0/100

10%

Network Requests Diagram

zcoptical.en.alibaba.com

10 ms

zcoptical.en.alibaba.com

312 ms

21 ms

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

207 ms

O1CN01Xt4rje1w9QKVzNB6S_!!6000000006265-2-tps-3084-90.png

55 ms

Our browser made a total of 82 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Zcoptical.en.alibaba.com, 39% (32 requests) were made to Img.alicdn.com and 17% (14 requests) were made to Sc02.alicdn.com. The less responsive or slowest element that took the longest time to load (6.5 sec) relates to the external source Img.alicdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 703.0 kB (19%)

Content Size

3.7 MB

After Optimization

3.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zcoptical.en.alibaba.com main page is 3.7 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. Javascripts take 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 472.0 kB

  • Original 577.6 kB
  • After minification 576.7 kB
  • After compression 105.6 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 472.0 kB or 82% of the original size.

Image Optimization

-2%

Potential reduce by 13.5 kB

  • Original 696.8 kB
  • After minification 683.3 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. Zc Optical En Alibaba images are well optimized though.

JavaScript Optimization

-9%

Potential reduce by 216.5 kB

  • Original 2.4 MB
  • After minification 2.4 MB
  • After compression 2.2 MB

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

-3%

Potential reduce by 1.0 kB

  • Original 35.9 kB
  • After minification 35.9 kB
  • After compression 34.8 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. Zcoptical.en.alibaba.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 38 (48%)

Requests Now

80

After Optimization

42

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 80 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zc Optical 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 17 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zcoptical.en.alibaba.com

zcoptical.en.alibaba.com

10 ms

zcoptical.en.alibaba.com

zcoptical.en.alibaba.com

312 ms

21 ms

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207 ms

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55 ms

232 ms

renderHeader.js

renderHeader.js

214 ms

awsc.js

awsc.js

34 ms

7 ms

7.gif

7.gif

473 ms

index.js

index.js

7 ms

index.js

index.js

10 ms

et_n.js

et_n.js

13 ms

um.js

um.js

84 ms

fsp.1.1

fsp.1.1

1453 ms

baxiaCommon.js

baxiaCommon.js

9 ms

wcfg.json

wcfg.json

1220 ms

rp

rp

1378 ms

wu.json

wu.json

688 ms

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505 ms

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29 ms

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22 ms

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27 ms

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37 ms

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29 ms

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47 ms

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32 ms

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36 ms

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39 ms

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45 ms

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433 ms

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477 ms

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560 ms

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382 ms

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478 ms

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476 ms

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783 ms

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467 ms

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495 ms

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904 ms

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848 ms

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947 ms

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895 ms

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936 ms

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812 ms

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834 ms

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1234 ms

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868 ms

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1225 ms

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6483 ms

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1228 ms

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1291 ms

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671 ms

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850 ms

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426 ms

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522 ms

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517 ms

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929 ms

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687 ms

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783 ms

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1000 ms

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1307 ms

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1613 ms

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1898 ms

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1241 ms

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1275 ms

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1283 ms

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1291 ms

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744 ms

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889 ms

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977 ms

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1347 ms

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1047 ms

um.json

um.json

52 ms

getUmid.do

getUmid.do

328 ms

eg.js

eg.js

4 ms

font_992356_jz8e219lwqi.css

font_992356_jz8e219lwqi.css

19 ms

normalize.css

normalize.css

22 ms

index.css

index.css

25 ms

mtoplib.min.js

mtoplib.min.js

8 ms

uploaded.js

uploaded.js

6 ms

index.js

index.js

57 ms

Accessibility Review

zcoptical.en.alibaba.com accessibility score

59

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

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

High

Image elements do not have [alt] attributes

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

zcoptical.en.alibaba.com best practices score

67

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

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

zcoptical.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 Zcoptical.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 Zcoptical.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

zcoptical.en.alibaba.com

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