Tools & Wizards About Us

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

vinabooks.vn

Sách, truyện, ebook | Nhà sách bán lẻ trực tuyến Vinabooks.vn

Page Load Speed

20.8 sec in total

First Response

2.5 sec

Resources Loaded

18 sec

Page Rendered

283 ms

About Website

Welcome to vinabooks.vn homepage info - get ready to check Vinabooks best content for Vietnam right away, or after learning these important things about vinabooks.vn

Nhà sách bán lẻ trực tuyến Vinabooks.vn, nơi đăng bán sách, truyện,...Giao sách và thu tiền tận nơi toàn quốc. Miễn phí giao sách trong nội thành Hà Nội.

Visit vinabooks.vn

Key Findings

We analyzed Vinabooks.vn page load time and found that the first response time was 2.5 sec and then it took 18.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

vinabooks.vn performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value14.3 s

0/100

25%

SI (Speed Index)

Value11.2 s

5/100

10%

TBT (Total Blocking Time)

Value490 ms

59/100

30%

CLS (Cumulative Layout Shift)

Value0.024

100/100

15%

TTI (Time to Interactive)

Value13.6 s

11/100

10%

Network Requests Diagram

vinabooks.vn

2506 ms

www.vinabooks.vn

2788 ms

css.css

537 ms

css.css

519 ms

cate.css

514 ms

Our browser made a total of 110 requests to load all elements on the main page. We found that 65% of them (72 requests) were addressed to the original Vinabooks.vn, 7% (8 requests) were made to Apis.google.com and 4% (4 requests) were made to S7.addthis.com. The less responsive or slowest element that took the longest time to load (12.1 sec) belongs to the original domain Vinabooks.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 747.2 kB (40%)

Content Size

1.9 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vinabooks.vn main page is 1.9 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. 65% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 119.6 kB

  • Original 153.9 kB
  • After minification 138.5 kB
  • After compression 34.3 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 119.6 kB or 78% of the original size.

Image Optimization

-24%

Potential reduce by 250.3 kB

  • Original 1.1 MB
  • After minification 800.4 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, Vinabooks needs image optimization as it can save up to 250.3 kB or 24% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-56%

Potential reduce by 338.3 kB

  • Original 599.1 kB
  • After minification 592.6 kB
  • After compression 260.8 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 338.3 kB or 56% of the original size.

CSS Optimization

-83%

Potential reduce by 39.0 kB

  • Original 46.9 kB
  • After minification 42.1 kB
  • After compression 7.9 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. Vinabooks.vn needs all CSS files to be minified and compressed as it can save up to 39.0 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (30%)

Requests Now

105

After Optimization

74

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 105 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vinabooks. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

vinabooks.vn accessibility score

74

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Names and labels

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.

Impact

Issue

High

Image elements do not have [alt] attributes

High

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

vinabooks.vn best practices score

50

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

vinabooks.vn SEO score

58

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    VI

  • Language Claimed

    VI

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vinabooks.vn can be misinterpreted by Google and other search engines. Our service has detected that Vietnamese is used on the page, and it matches the claimed language. Our system also found out that Vinabooks.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

Open Graph description is not detected on the main page of Vinabooks. 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: