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name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value20.7 s

0/100

25%

SI (Speed Index)

Value3.6 s

86/100

10%

TBT (Total Blocking Time)

Value90 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.187

65/100

15%

TTI (Time to Interactive)

Value5.1 s

76/100

10%

519mm.com

506 ms

ate.css

144 ms

zui.css

293 ms

tb.js

146 ms

qq1.js

145 ms

Our browser made a total of 96 requests to load all elements on the main page. We found that 21% of them (20 requests) were addressed to the original 519mm.com, 31% (30 requests) were made to R9n9ej2gmhde.sisiyy.com and 17% (16 requests) were made to 155pic.com. The less responsive or slowest element that took the longest time to load (19.9 sec) relates to the external source Img2.imgtp.com.

Content Size

388.6 kB

After Optimization

320.3 kB

In fact, the total size of 519mm.com main page is 388.6 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 a small number of websites need less resources to load. Images take 281.6 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 46.4 kB

Original 55.3 kB
After minification 54.5 kB
After compression 8.9 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. 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 46.4 kB or 84% of the original size.

Image Optimization

-1%

Potential reduce by 1.6 kB

Original 281.6 kB
After minification 279.9 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. 519 Mm images are well optimized though.

JavaScript Optimization

-34%

Potential reduce by 3.2 kB

Original 9.4 kB
After minification 8.3 kB
After compression 6.2 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 3.2 kB or 34% of the original size.

CSS Optimization

-40%

Potential reduce by 17.1 kB

Original 42.3 kB
After minification 42.3 kB
After compression 25.2 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. 519mm.com needs all CSS files to be minified and compressed as it can save up to 17.1 kB or 40% of the original size.

Requests Now

After Optimization

The browser has sent 89 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 519 Mm. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 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 the experience of reading tabular or list data using assistive technology, like a screen reader.

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

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

Links do not have a discernible name

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

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

High

Browser errors were logged to the console

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

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 519mm.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 519mm.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

519mm.com

Open Graph description is not detected on the main page of 519 Mm. 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

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

519mm.com

ate.css

zui.css

tb.js

qq1.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

519mm.com

ate.css

zui.css

tb.js

qq1.js

dht.js

dh.js

tj.js

sp.js

heyzo-3147.jpg!320x216.jpg

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FC2PPV-3780033.jpg!320x216%20(1).jpg

sp1.js

qptb.js

qq2.js

qq3.js

FC2PPV-3780033.jpg!320x216.jpg

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FC2PPV-3777910.jpg!320x216.jpg

tb.js

qq1.js

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960-120.webp

960-120.webp

960-120.webp