Report Summary

  • 95

    Performance

    Renders faster than
    93% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

jd-elevator.com

久德机电 - 苏州久德机电科技有限公司

Page Load Speed

4 sec in total

First Response

546 ms

Resources Loaded

3.4 sec

Page Rendered

87 ms

jd-elevator.com screenshot

About Website

Welcome to jd-elevator.com homepage info - get ready to check Jd Elevator best content right away, or after learning these important things about jd-elevator.com

苏州久德机电科技有限公司位于世界电梯制造中心-苏州,是一家电梯系统和零部件一体化供应商。公司拥有一批来自欧洲顶级电梯公司、具有10多年资深经验的优秀团队。我们提供电梯门、曳引机、钢丝绳、线缆等零部件及服务。

Visit jd-elevator.com

Key Findings

We analyzed Jd-elevator.com page load time and found that the first response time was 546 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

jd-elevator.com performance score

95

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

90/100

25%

SI (Speed Index)

Value4.2 s

77/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.4 s

100/100

10%

Network Requests Diagram

jd-elevator.com

546 ms

reset.css

220 ms

jquery-1.9.0.min.js

1521 ms

image10.png

1305 ms

image14.png

436 ms

Our browser made a total of 6 requests to load all elements on the main page. We found that all of those requests were addressed to Jd-elevator.com and no external sources were called. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Jd-elevator.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 145.8 kB (52%)

Content Size

282.4 kB

After Optimization

136.6 kB

In fact, the total size of Jd-elevator.com main page is 282.4 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. Only 10% of websites need less resources to load. Images take 186.0 kB which makes up the majority of the site volume.

HTML Optimization

-54%

Potential reduce by 1.5 kB

  • Original 2.7 kB
  • After minification 2.7 kB
  • After compression 1.2 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 1.5 kB or 54% of the original size.

Image Optimization

-45%

Potential reduce by 84.4 kB

  • Original 186.0 kB
  • After minification 101.7 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, Jd Elevator needs image optimization as it can save up to 84.4 kB or 45% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-64%

Potential reduce by 60.0 kB

  • Original 93.1 kB
  • After minification 93.1 kB
  • After compression 33.1 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 60.0 kB or 64% of the original size.

CSS Optimization

-8%

Potential reduce by 47 B

  • Original 611 B
  • After minification 611 B
  • After compression 564 B

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. Jd-elevator.com has all CSS files already compressed.

Requests Breakdown

We found no issues to fix!

Requests Now

5

After Optimization

5

The browser has sent 5 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jd Elevator. According to our analytics all requests are already optimized.

Accessibility Review

jd-elevator.com accessibility score

91

Accessibility Issues

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

jd-elevator.com best practices score

67

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

jd-elevator.com SEO score

67

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

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

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