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name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value5.9 s

48/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.348

32/100

15%

TTI (Time to Interactive)

Value6.1 s

63/100

10%

norson-audio.com

49 ms

norson-audio.com

147 ms

z15sbq.xyz

1068 ms

main.html

209 ms

style.min.css

205 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 7% of them (2 requests) were addressed to the original Norson-audio.com, 82% (23 requests) were made to Z15sbq.xyz and 4% (1 request) were made to S9.cnzz.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Z12.cnzz.com.

Content Size

1.3 MB

After Optimization

1.1 MB

In fact, the total size of Norson-audio.com main page is 1.3 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. 20% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-62%

Potential reduce by 1.0 kB

Original 1.6 kB
After minification 1.1 kB
After compression 619 B

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 526 B, which is 32% 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 1.0 kB or 62% of the original size.

Image Optimization

-8%

Potential reduce by 90.1 kB

Original 1.1 MB
After minification 973.5 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. Norson Audio images are well optimized though.

JavaScript Optimization

-20%

Potential reduce by 25.5 kB

Original 130.0 kB
After minification 129.5 kB
After compression 104.5 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 25.5 kB or 20% of the original size.

CSS Optimization

-88%

Potential reduce by 73.4 kB

Original 83.1 kB
After minification 62.2 kB
After compression 9.7 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. Norson-audio.com needs all CSS files to be minified and compressed as it can save up to 73.4 kB or 88% of the original size.

Requests Now

After Optimization

The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Norson Audio. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

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

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

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

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

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

Language and Encoding

Language Detected

ZH
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Norson-audio.com 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 English language. Our system also found out that Norson-audio.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

Open Graph description is not detected on the main page of Norson Audio. 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

十大最污软件污污污-十大最黄最污的软件下载-最污十大软件免费-十大最污免费软件下载

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

norson-audio.com

norson-audio.com

z15sbq.xyz

main.html

style.min.css

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

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Accessibility Review

Accessibility Issues

Best Practices

Areas of Improvement

SEO Factors

Search Engine Optimization Advices

Language and Encoding

Language Detected

Language Claimed

Encoding

Social Sharing Optimization

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