Access en51.com. 新航道在线雅思托福培训，名师团队在线一对一辅导

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value11.5 s

0/100

25%

SI (Speed Index)

Value12.3 s

3/100

10%

TBT (Total Blocking Time)

Value270 ms

82/100

30%

CLS (Cumulative Layout Shift)

Value0.276

44/100

15%

TTI (Time to Interactive)

Value7.7 s

46/100

10%

en51.com

1094 ms

www.en51.com

3972 ms

bootstrap.min.css

1398 ms

font-awesome.min.css

1047 ms

normalize.css

1045 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that 75% of them (51 requests) were addressed to the original En51.com, 4% (3 requests) were made to Combo.b.qq.com and 3% (2 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (15.9 sec) relates to the external source Tajs.qq.com.

Content Size

1.4 MB

After Optimization

1.1 MB

In fact, the total size of En51.com main page is 1.4 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. 35% of websites need less resources to load. Images take 961.3 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 53.1 kB

Original 71.0 kB
After minification 64.0 kB
After compression 17.8 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 53.1 kB or 75% of the original size.

Image Optimization

-8%

Potential reduce by 78.3 kB

Original 961.3 kB
After minification 883.0 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. En 51 images are well optimized though.

JavaScript Optimization

-42%

Potential reduce by 96.5 kB

Original 229.3 kB
After minification 228.3 kB
After compression 132.8 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 96.5 kB or 42% of the original size.

CSS Optimization

-81%

Potential reduce by 133.6 kB

Original 164.8 kB
After minification 154.1 kB
After compression 31.2 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. En51.com needs all CSS files to be minified and compressed as it can save up to 133.6 kB or 81% of the original size.

Requests Now

After Optimization

The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of En 51. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 7 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 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.

High

Definition list items are not wrapped in <dl> elements

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 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

Missing source maps for large first-party JavaScript

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 doesn't use legible font sizes

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 En51.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 En51.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

en51.com

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

新航道在线雅思托福培训，名师团队在线一对一辅导

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

en51.com

www.en51.com

bootstrap.min.css

font-awesome.min.css

normalize.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

en51.com

www.en51.com

bootstrap.min.css

font-awesome.min.css

normalize.css

non-responsive.css

sidebar3.css

publish.js

en51.css

zzsc.css

head2016.jsp

hm.js

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