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jh17.cn screenshot

Report Summary

  • 72

    Performance

    Renders faster than
    82% of other websites

  • 44

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

jh17.cn

上海菁华科技仪器有限公司

Page Load Speed

5.3 sec in total

First Response

819 ms

Resources Loaded

4.4 sec

Page Rendered

77 ms

jh17.cn screenshot

About Website

Welcome to jh17.cn homepage info - get ready to check Jh 17 best content right away, or after learning these important things about jh17.cn

上海菁华科技仪器有限公司

Visit jh17.cn

Key Findings

We analyzed Jh17.cn page load time and found that the first response time was 819 ms and then it took 4.5 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

jh17.cn performance score

72

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.7 s

93/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

36/100

25%

SI (Speed Index)

Value5.9 s

48/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.208

60/100

15%

TTI (Time to Interactive)

Value1.7 s

100/100

10%

Network Requests Diagram

jh17.cn

819 ms

common.css

436 ms

base.js

659 ms

common.js

439 ms

form.js

440 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that all of those requests were addressed to Jh17.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Jh17.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 98.4 kB (17%)

Content Size

595.9 kB

After Optimization

497.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jh17.cn main page is 595.9 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. 20% of websites need less resources to load. Images take 528.4 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 19.1 kB

  • Original 22.8 kB
  • After minification 21.7 kB
  • After compression 3.7 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 19.1 kB or 84% of the original size.

Image Optimization

-14%

Potential reduce by 74.1 kB

  • Original 528.4 kB
  • After minification 454.3 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. Obviously, Jh 17 needs image optimization as it can save up to 74.1 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

-11%

Potential reduce by 4.7 kB

  • Original 42.0 kB
  • After minification 42.0 kB
  • After compression 37.2 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 4.7 kB or 11% of the original size.

CSS Optimization

-18%

Potential reduce by 490 B

  • Original 2.8 kB
  • After minification 2.8 kB
  • After compression 2.3 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. Jh17.cn needs all CSS files to be minified and compressed as it can save up to 490 B or 18% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (47%)

Requests Now

34

After Optimization

18

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jh 17. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jh17.cn

jh17.cn

819 ms

common.css

common.css

436 ms

base.js

base.js

659 ms

common.js

common.js

439 ms

form.js

form.js

440 ms

blockui.js

blockui.js

441 ms

tpl_advsslides.css

tpl_advsslides.css

446 ms

tpl_advsslides.js

tpl_advsslides.js

869 ms

dropmenu.css

dropmenu.css

872 ms

dropmenu.js

dropmenu.js

881 ms

searchform.css

searchform.css

889 ms

searchform.js

searchform.js

904 ms

newslist.css

newslist.css

1094 ms

bottommenu.css

bottommenu.css

1301 ms

bg.png

bg.png

643 ms

5bee5b8c8802a.jpg

5bee5b8c8802a.jpg

1300 ms

5bee5b943dcdb.jpg

5bee5b943dcdb.jpg

1338 ms

5bee5b9bcc7b4.jpg

5bee5b9bcc7b4.jpg

1369 ms

62c3a2d99fb2c.jpg

62c3a2d99fb2c.jpg

1314 ms

1414134344.jpg

1414134344.jpg

1067 ms

searchr.png

searchr.png

1082 ms

1356502573.png

1356502573.png

1495 ms

1356503098.png

1356503098.png

1527 ms

1356503130.png

1356503130.png

1750 ms

1356503157.png

1356503157.png

1749 ms

201607141468479945185.gif

201607141468479945185.gif

1774 ms

s1_bg.png

s1_bg.png

1596 ms

menunow.png

menunow.png

1730 ms

menu.png

menu.png

1755 ms

searchl.png

searchl.png

1923 ms

mbg.png

mbg.png

1926 ms

bbg.png

bbg.png

1947 ms

5bee5b8c8802a.jpg

5bee5b8c8802a.jpg

2639 ms

s1-loading.gif

s1-loading.gif

1752 ms

s1_btnow.png

s1_btnow.png

1761 ms

s1_bt.png

s1_bt.png

2000 ms

Accessibility Review

jh17.cn accessibility score

44

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

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

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

jh17.cn best practices score

58

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

Browser errors were logged to the console

SEO Factors

jh17.cn SEO score

54

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

High

robots.txt is not valid

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

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 Jh17.cn 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 Jh17.cn 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

jh17.cn

Open Graph description is not detected on the main page of Jh 17. 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: