Access sachbaovn.vn. SachbaoVN - Sách điện tử - Tạp chí - Sách bộ

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

81/100

10%

LCP (Largest Contentful Paint)

Value9.3 s

1/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.442

21/100

15%

TTI (Time to Interactive)

Value7.2 s

51/100

10%

sachbaovn.vn

5721 ms

home.css

1021 ms

cssverticalmenu.js

880 ms

jquery-1.4.1.js

583 ms

jcarousellite_1.0.1.js

805 ms

Our browser made a total of 100 requests to load all elements on the main page. We found that 96% of them (96 requests) were addressed to the original Sachbaovn.vn, 2% (2 requests) were made to Google-analytics.com and 2% (2 requests) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (5.7 sec) belongs to the original domain Sachbaovn.vn.

Content Size

1.4 MB

After Optimization

830.6 kB

In fact, the total size of Sachbaovn.vn 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 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 44.0 kB

Original 55.8 kB
After minification 54.1 kB
After compression 11.9 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 44.0 kB or 79% of the original size.

Image Optimization

-30%

Potential reduce by 317.4 kB

Original 1.1 MB
After minification 741.4 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. Obviously, SachbaoVN needs image optimization as it can save up to 317.4 kB or 30% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-73%

Potential reduce by 199.1 kB

Original 271.5 kB
After minification 192.1 kB
After compression 72.4 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 199.1 kB or 73% of the original size.

CSS Optimization

-81%

Potential reduce by 21.9 kB

Original 26.9 kB
After minification 24.7 kB
After compression 5.0 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. Sachbaovn.vn needs all CSS files to be minified and compressed as it can save up to 21.9 kB or 81% of the original size.

Requests Now

After Optimization

The browser has sent 99 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SachbaoVN. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 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 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

Form elements do not have associated labels

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>).

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

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

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 Sachbaovn.vn 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 Sachbaovn.vn 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

sachbaovn.vn

Open Graph data is detected on the main page of SachbaoVN. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

SachbaoVN - Sách điện tử - Tạp chí - Sách bộ - Sách lẻ

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

sachbaovn.vn

home.css

cssverticalmenu.js

jquery-1.4.1.js

jcarousellite_1.0.1.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

sachbaovn.vn

home.css

cssverticalmenu.js

jquery-1.4.1.js

jcarousellite_1.0.1.js

napthe.js

WebResource.axd

Site.css

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