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ah.51zsjc.com screenshot

28

Performance

Renders faster than
48% of other websites
61

Accessibility

Visual factors better than
that of 27% of websites
50

Best Practices

More advanced features
available than in
18% of websites
62

SEO

Google-friendlier than
22% of websites

First Response

2.9 sec

Resources Loaded

11.2 sec

Page Rendered

217 ms

ah.51zsjc.com screenshot

About Website

Click here to check amazing Ah 51 Zsjc content. Otherwise, check out these important facts you probably never knew about ah.51zsjc.com

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Key Findings

We analyzed Ah.51zsjc.com page load time and found that the first response time was 2.9 sec and then it took 11.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

name

value

score

weighting

FCP (First Contentful Paint)

Value5.9 s

4/100

10%

LCP (Largest Contentful Paint)

Value10.3 s

0/100

25%

SI (Speed Index)

Value16.0 s

0/100

10%

TBT (Total Blocking Time)

Value760 ms

39/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value14.8 s

8/100

10%

ah.51zsjc.com

2869 ms

common.css

430 ms

jquery-1.4.2.js

4495 ms

c2cb55d13d1b.js

4945 ms

Fwsilder.js

451 ms

Our browser made a total of 152 requests to load all elements on the main page. We found that 61% of them (92 requests) were addressed to the original Ah.51zsjc.com, 20% (30 requests) were made to 51zsjc.com and 5% (7 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (4.9 sec) belongs to the original domain Ah.51zsjc.com.

Content Size

2.0 MB

After Optimization

1.4 MB

In fact, the total size of Ah.51zsjc.com main page is 2.0 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

-83%

Potential reduce by 93.0 kB

Original 111.9 kB
After minification 89.6 kB
After compression 18.9 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 22.3 kB, which is 20% 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 93.0 kB or 83% of the original size.

Image Optimization

-5%

Potential reduce by 40.4 kB

Original 802.7 kB
After minification 762.3 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. Ah 51 Zsjc images are well optimized though.

JavaScript Optimization

-42%

Potential reduce by 441.4 kB

Original 1.0 MB
After minification 976.9 kB
After compression 606.6 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 441.4 kB or 42% of the original size.

CSS Optimization

-85%

Potential reduce by 22.0 kB

Original 25.8 kB
After minification 21.4 kB
After compression 3.8 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. Ah.51zsjc.com needs all CSS files to be minified and compressed as it can save up to 22.0 kB or 85% of the original size.

Requests Now

148

After Optimization

83

The browser has sent 148 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ah 51 Zsjc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

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.

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

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

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

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ah.51zsjc.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 Ah.51zsjc.com main page’s claimed encoding is gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

ah.51zsjc.com

Open Graph description is not detected on the main page of Ah 51 Zsjc. 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: