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51zxw.net screenshot

19

Performance

Renders faster than
36% of other websites
54

Accessibility

Visual factors better than
that of 23% of websites
67

Best Practices

More advanced features
available than in
24% of websites
58

SEO

Google-friendlier than
20% of websites

First Response

4.5 sec

Resources Loaded

66.5 sec

Page Rendered

461 ms

51zxw.net screenshot

About Website

Welcome to 51zxw.net homepage info - get ready to check 51 Zxw best content for China right away, or after learning these important things about 51zxw.net

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Visit 51zxw.net

Key Findings

We analyzed 51zxw.net page load time and found that the first response time was 4.5 sec and then it took 66.9 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

8/100

10%

LCP (Largest Contentful Paint)

Value8.8 s

1/100

25%

SI (Speed Index)

Value11.6 s

4/100

10%

TBT (Total Blocking Time)

Value2,020 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value17.5 s

4/100

10%

51zxw.net

4495 ms

www.51zxw.net

10026 ms

thickbox.css

694 ms

js.js

2015 ms

thickbox_sc.js

2339 ms

Our browser made a total of 245 requests to load all elements on the main page. We found that 76% of them (186 requests) were addressed to the original 51zxw.net, 4% (10 requests) were made to Bdimg.share.baidu.com and 2% (6 requests) were made to Cpro.baidustatic.com. The less responsive or slowest element that took the longest time to load (19.7 sec) belongs to the original domain 51zxw.net.

Content Size

2.0 MB

After Optimization

1.5 MB

In fact, the total size of 51zxw.net 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. 60% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 125.3 kB

Original 155.6 kB
After minification 137.5 kB
After compression 30.2 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. This page needs HTML code to be minified as it can gain 18.1 kB, which is 12% 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 125.3 kB or 81% of the original size.

Image Optimization

-6%

Potential reduce by 78.7 kB

Original 1.4 MB
After minification 1.3 MB

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. 51 Zxw images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 269.0 kB

Original 464.7 kB
After minification 452.9 kB
After compression 195.6 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 269.0 kB or 58% of the original size.

CSS Optimization

-77%

Potential reduce by 26.6 kB

Original 34.8 kB
After minification 30.8 kB
After compression 8.2 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. 51zxw.net needs all CSS files to be minified and compressed as it can save up to 26.6 kB or 77% of the original size.

Requests Now

240

After Optimization

138

The browser has sent 240 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Zxw. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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 the interpretation of your content by users in different locales.

High

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

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

Missing source maps for large first-party JavaScript

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

GB
Encoding

GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51zxw.net can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it does not match the claimed language. Our system also found out that 51zxw.net 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

51zxw.net

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