Access compressor.cn. 压缩机网-空压机|行业权威媒体

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value17.7 s

0/100

25%

SI (Speed Index)

Value40.3 s

0/100

10%

TBT (Total Blocking Time)

Value4,110 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.058

98/100

15%

TTI (Time to Interactive)

Value20.7 s

2/100

10%

compressor.cn

1384 ms

www.compressor.cn

6451 ms

compre_ZH_index.css

4245 ms

global_insert.css

4982 ms

jquery.min.js

1296 ms

Our browser made a total of 137 requests to load all elements on the main page. We found that 61% of them (84 requests) were addressed to the original Compressor.cn, 7% (10 requests) were made to Globalcompressor.com and 6% (8 requests) were made to Compressoronline.cn. The less responsive or slowest element that took the longest time to load (20.2 sec) relates to the external source Compressoronline.cn.

Content Size

828.3 kB

After Optimization

452.9 kB

In fact, the total size of Compressor.cn main page is 828.3 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 343.6 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 105.7 kB

Original 133.9 kB
After minification 124.8 kB
After compression 28.2 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 105.7 kB or 79% of the original size.

Image Optimization

-8%

Potential reduce by 27.2 kB

Original 343.6 kB
After minification 316.4 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. Compressor images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 149.3 kB

Original 238.2 kB
After minification 233.1 kB
After compression 88.9 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 149.3 kB or 63% of the original size.

CSS Optimization

-83%

Potential reduce by 93.3 kB

Original 112.7 kB
After minification 96.8 kB
After compression 19.3 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. Compressor.cn needs all CSS files to be minified and compressed as it can save up to 93.3 kB or 83% of the original size.

Requests Now

131

After Optimization

The browser has sent 131 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Compressor. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 6 to 1 for CSS 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 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

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>).

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

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

Page has valid source maps

Search Engine Optimization Advices

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

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Compressor.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 Compressor.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

compressor.cn

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

Report Summary

Performance

Accessibility

Best Practices

SEO

压缩机网-空压机|行业权威媒体_交大专业技术

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

compressor.cn

www.compressor.cn

compre_ZH_index.css

global_insert.css

jquery.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

compressor.cn

www.compressor.cn

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config.js

common.js

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validator.js

tm.js

islogin.php

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