Access 123tailieufree.com. 123tailieufree.com | Cộng đồng chia sẻ tài liệu, luận án tốt nghiệp, giáo án điện tử, bài giảng điện...

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

43/100

25%

SI (Speed Index)

Value4.0 s

81/100

10%

TBT (Total Blocking Time)

Value300 ms

78/100

30%

CLS (Cumulative Layout Shift)

Value0.122

84/100

15%

TTI (Time to Interactive)

Value13.1 s

12/100

10%

123tailieufree.com

66 ms

www.123tailieufree.com

264 ms

55013136-widget_css_bundle.css

32 ms

font-awesome.min.css

45 ms

jquery.min.js

27 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 17% of them (12 requests) were addressed to the original 123tailieufree.com, 55% (39 requests) were made to Blogger.googleusercontent.com and 6% (4 requests) were made to Blogger.com. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source Blogger.googleusercontent.com.

Content Size

1.2 MB

After Optimization

1.0 MB

In fact, the total size of 123tailieufree.com main page is 1.2 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. 30% of websites need less resources to load. Images take 879.8 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 97.3 kB

Original 127.9 kB
After minification 127.6 kB
After compression 30.5 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 97.3 kB or 76% of the original size.

Image Optimization

-3%

Potential reduce by 24.6 kB

Original 879.8 kB
After minification 855.3 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. 123 Tailieufree images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 769 B

Original 120.8 kB
After minification 120.8 kB
After compression 120.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-78%

Potential reduce by 24.0 kB

Original 30.6 kB
After minification 30.5 kB
After compression 6.6 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. 123tailieufree.com needs all CSS files to be minified and compressed as it can save up to 24.0 kB or 78% of the original size.

Requests Now

After Optimization

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 123 Tailieufree. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 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 legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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

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

Browser errors were logged to the console

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

VI
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 123tailieufree.com can be misinterpreted by Google and other search engines. Our service has detected that Vietnamese 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 123tailieufree.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

123tailieufree.com

Open Graph description is not detected on the main page of 123 Tailieufree. 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

123tailieufree.com | Cộng đồng chia sẻ tài liệu, luận án tốt nghiệp, giáo án điện tử, bài giảng điện tử

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

123tailieufree.com

www.123tailieufree.com

55013136-widget_css_bundle.css

font-awesome.min.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

123tailieufree.com

www.123tailieufree.com

55013136-widget_css_bundle.css

font-awesome.min.css

jquery.min.js

email-decode.min.js

1513423867-widgets.js

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