Tools & Wizards About Us

Report Summary

  • 60

    Performance

    Renders faster than
    75% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

china-sda.com

Hangzhou Shengda Bearing Co., Ltd.

Page Load Speed

4.6 sec in total

First Response

657 ms

Resources Loaded

3.1 sec

Page Rendered

825 ms

About Website

Welcome to china-sda.com homepage info - get ready to check China Sda best content right away, or after learning these important things about china-sda.com

Hangzhou Shengda Bearing Co., Ltd is a famous China Deep Groove Ball Bearings manufacturers and wholesale Deep Groove Ball Bearings suppliers.

Visit china-sda.com

Key Findings

We analyzed China-sda.com page load time and found that the first response time was 657 ms and then it took 3.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

china-sda.com performance score

60

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

64/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

45/100

25%

SI (Speed Index)

Value4.5 s

73/100

10%

TBT (Total Blocking Time)

Value470 ms

61/100

30%

CLS (Cumulative Layout Shift)

Value0.237

53/100

15%

TTI (Time to Interactive)

Value4.0 s

87/100

10%

Network Requests Diagram

www.china-sda.com

657 ms

slick.css

114 ms

basic.css

125 ms

main.css

110 ms

font-awesome.min.css

133 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that all of those requests were addressed to China-sda.com and no external sources were called. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain China-sda.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 80.6 kB (11%)

Content Size

743.4 kB

After Optimization

662.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of China-sda.com main page is 743.4 kB. 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 628.6 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 73.3 kB

  • Original 81.2 kB
  • After minification 69.4 kB
  • After compression 7.8 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. This page needs HTML code to be minified as it can gain 11.7 kB, which is 14% 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 73.3 kB or 90% of the original size.

Image Optimization

-1%

Potential reduce by 4.6 kB

  • Original 628.6 kB
  • After minification 624.0 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. China Sda images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 17 B

  • Original 655 B
  • After minification 655 B
  • After compression 638 B

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

-8%

Potential reduce by 2.7 kB

  • Original 33.0 kB
  • After minification 33.0 kB
  • After compression 30.3 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. China-sda.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 17 (33%)

Requests Now

52

After Optimization

35

  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of China Sda. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

china-sda.com accessibility score

72

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

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

High

Links do not have a discernible name

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

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

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

china-sda.com best practices score

75

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

Page has valid source maps

SEO Factors

china-sda.com SEO score

85

Search Engine Optimization Advices

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

High

Document doesn't have a valid hreflang

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise China-sda.com can be misinterpreted by Google and other search engines. Our service has detected that English 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 China-sda.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 China Sda. 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: