Tools & Wizards About Us
head21.en.alibaba.com screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

head21.en.alibaba.com

Company Overview - Shenyang Head Science and Technology Corporation Limited

Page Load Speed

6.1 sec in total

First Response

1.4 sec

Resources Loaded

4.2 sec

Page Rendered

497 ms

head21.en.alibaba.com screenshot

About Website

Click here to check amazing Head 21 En Alibaba content for China. Otherwise, check out these important facts you probably never knew about head21.en.alibaba.com

Shenyang Head Science and Technology Corporation Limited Products:Water Jet Cutting Machine

Visit head21.en.alibaba.com

Key Findings

We analyzed Head21.en.alibaba.com page load time and found that the first response time was 1.4 sec and then it took 4.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

head21.en.alibaba.com performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

66/100

10%

LCP (Largest Contentful Paint)

Value17.7 s

0/100

25%

SI (Speed Index)

Value16.6 s

0/100

10%

TBT (Total Blocking Time)

Value5,040 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.044

99/100

15%

TTI (Time to Interactive)

Value26.7 s

0/100

10%

Network Requests Diagram

head21.en.alibaba.com

1353 ms

head21.en.alibaba.com

203 ms

44 ms

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

53 ms

index.js

114 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 7% of them (3 requests) were addressed to the original Head21.en.alibaba.com, 33% (15 requests) were made to S.alicdn.com and 20% (9 requests) were made to Sc04.alicdn.com. The less responsive or slowest element that took the longest time to load (2.7 sec) relates to the external source S.alicdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 410.6 kB (29%)

Content Size

1.4 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Head21.en.alibaba.com main page is 1.4 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. 40% of websites need less resources to load. Javascripts take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 308.1 kB

  • Original 386.4 kB
  • After minification 385.6 kB
  • After compression 78.3 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. 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 308.1 kB or 80% of the original size.

Image Optimization

-14%

Potential reduce by 3.1 kB

  • Original 23.2 kB
  • After minification 20.0 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. Obviously, Head 21 En Alibaba needs image optimization as it can save up to 3.1 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-10%

Potential reduce by 99.3 kB

  • Original 1.0 MB
  • After minification 1.0 MB
  • After compression 919.2 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. This website has mostly compressed JavaScripts.

Requests Breakdown

Number of requests can be reduced by 28 (65%)

Requests Now

43

After Optimization

15

  • AJAX
  • Images
  • JavaScript

The browser has sent 43 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Head 21 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

head21.en.alibaba.com

head21.en.alibaba.com

1353 ms

head21.en.alibaba.com

head21.en.alibaba.com

203 ms

44 ms

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

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

53 ms

index.js

index.js

114 ms

index.js

index.js

53 ms

renderHeader.js

renderHeader.js

112 ms

awsc.js

awsc.js

279 ms

39 ms

A8123aa69588f4295ba3d005e60156bf4t.png

A8123aa69588f4295ba3d005e60156bf4t.png

543 ms

TB2VEMqk8yWBuNkSmFPXXXguVXa_!!3377521498.png

TB2VEMqk8yWBuNkSmFPXXXguVXa_!!3377521498.png

648 ms

Hcf1253c9c2a246cfa89f38e0f1c44e483.jpg

Hcf1253c9c2a246cfa89f38e0f1c44e483.jpg

397 ms

Small-cnc-water-jet-cutting-machine-price.png_350x350.png

Small-cnc-water-jet-cutting-machine-price.png_350x350.png

638 ms

undefined

undefined

50 ms

Fully-enclosed-small-convenient-metal-water-jet.jpg_350x350.jpg

Fully-enclosed-small-convenient-metal-water-jet.jpg_350x350.jpg

581 ms

HEAD-mini-waterjet-cutting-machine.png_350x350.png

HEAD-mini-waterjet-cutting-machine.png_350x350.png

625 ms

fully-enclosed-mini-water-jet-cutters-school.jpg_350x350.jpg

fully-enclosed-mini-water-jet-cutters-school.jpg_350x350.jpg

581 ms

water-jet-cutting-machine-portable-water-jet.png_350x350.png

water-jet-cutting-machine-portable-water-jet.png_350x350.png

598 ms

water-jet-cutting-machine-for-metal-waterjet.jpg_350x350.jpg

water-jet-cutting-machine-for-metal-waterjet.jpg_350x350.jpg

549 ms

cheap-water-jet-machine-Efficient-cutting-of.jpg_350x350.jpg

cheap-water-jet-machine-Efficient-cutting-of.jpg_350x350.jpg

842 ms

5axis-Essential-for-efficient-metal-cutting-100mm.png_350x350.png

5axis-Essential-for-efficient-metal-cutting-100mm.png_350x350.png

1138 ms

HEAD1020-water-cutter-manufacture-abrasive-water-jet.png_350x350.png

HEAD1020-water-cutter-manufacture-abrasive-water-jet.png_350x350.png

825 ms

H2b1c1c6a35fc408c96015d1bed1b2330V.jpg

H2b1c1c6a35fc408c96015d1bed1b2330V.jpg

461 ms

O1CN01REbO5M1iNFNVX2yeq_!!6000000004400-2-tps-1920-200.png

O1CN01REbO5M1iNFNVX2yeq_!!6000000004400-2-tps-1920-200.png

49 ms

O1CN01kpueUS231orwYDJAV_!!6000000007196-2-tps-132-34.png

O1CN01kpueUS231orwYDJAV_!!6000000007196-2-tps-132-34.png

49 ms

O1CN01gZ3lTu1XIFHZfHHGr_!!6000000002900-2-tps-36-36.png

O1CN01gZ3lTu1XIFHZfHHGr_!!6000000002900-2-tps-36-36.png

36 ms

Hf097e22fb3f4421a91c331cf705e377fa.jpg

Hf097e22fb3f4421a91c331cf705e377fa.jpg

541 ms

Hf15944bfeda545faba9fee1a4f36f61dG.jpg_300x300.jpg

Hf15944bfeda545faba9fee1a4f36f61dG.jpg_300x300.jpg

445 ms

U3ca8fbe02f3f4a2fbbd794b01a73f63ed.jpg_300x300.jpg

U3ca8fbe02f3f4a2fbbd794b01a73f63ed.jpg_300x300.jpg

1136 ms

Ha86c770fc4764deb81d89d5cec0ba05co.jpg_300x300.jpg

Ha86c770fc4764deb81d89d5cec0ba05co.jpg_300x300.jpg

528 ms

HTB18EVlbsfrK1RkSmLyq6xGApXak.jpg_300x300.jpg

HTB18EVlbsfrK1RkSmLyq6xGApXak.jpg_300x300.jpg

422 ms

H83ed65f2e37b4ce383b965c9956170b1O.jpg_300x300.jpg

H83ed65f2e37b4ce383b965c9956170b1O.jpg_300x300.jpg

1647 ms

Hc7f0ff2b793148eeaac37dbc2fa6cbfcn.jpg_300x300.jpg

Hc7f0ff2b793148eeaac37dbc2fa6cbfcn.jpg_300x300.jpg

2686 ms

HTB1XKnQagaTBuNjSszfq6xgfpXam.jpg_300x300.jpg

HTB1XKnQagaTBuNjSszfq6xgfpXam.jpg_300x300.jpg

883 ms

TB2.yuutv5TBuNjSspmXXaDRVXa_!!3377521498.png

TB2.yuutv5TBuNjSspmXXaDRVXa_!!3377521498.png

1073 ms

TB2BnoEgtcnBKNjSZR0XXcFqFXa_!!3377521498.png

TB2BnoEgtcnBKNjSZR0XXcFqFXa_!!3377521498.png

1054 ms

Ad307d7eb7b9d47cd934da3aadf87ff5dg.jpg

Ad307d7eb7b9d47cd934da3aadf87ff5dg.jpg

863 ms

H99445ec7b087430dbdb2fd38803316c8L.png

H99445ec7b087430dbdb2fd38803316c8L.png

467 ms

7.gif

7.gif

368 ms

et_f.js

et_f.js

44 ms

um.js

um.js

126 ms

wu.json

wu.json

684 ms

eg.js

eg.js

3 ms

um.json

um.json

59 ms

getUmid.do

getUmid.do

306 ms

index.js

index.js

10 ms

Accessibility Review

head21.en.alibaba.com accessibility score

73

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

head21.en.alibaba.com best practices score

58

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

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

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

head21.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 Head21.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 Head21.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

head21.en.alibaba.com

Open Graph data is detected on the main page of Head 21 En Alibaba. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: