Access .vn. Thư Viện Số Của Thư Viện Quốc Gia Việt Nam

Report Summary

• 50

  Performance

  Renders faster than 68% of other websites

• 75

  Accessibility

  Visual factors better than that of 41% of websites

• 75

  Best Practices

  More advanced features available than in 35% of websites

• 58

  SEO

  Google-friendlier than 21% of websites

dl.nlv.gov.vn Thư viện số của Thư viện Quốc gia Việt Nam

Page Load Speed

5.1 sec in total

First Response

1 sec

Resources Loaded

4 sec

Page Rendered

72 ms

About Website

Click here to check amazing Dl Nlv content for Vietnam. Otherwise, check out these important facts you probably never knew about dl.nlv.gov.vn

Visit dl.nlv.gov.vn

Key Findings

We analyzed Dl.nlv.gov.vn page load time and found that the first response time was 1 sec and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

dl.nlv.gov.vn performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

7/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

4/100

25%

SI (Speed Index)

Value9.3 s

12/100

10%

TBT (Total Blocking Time)

Value200 ms

89/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value7.3 s

50/100

10%

Network Requests Diagram

dl.nlv.gov.vn

1025 ms

vietnam-landing.css

489 ms

jquery-1.4.4.min.js

1229 ms

jquery.cooquery.min.js

492 ms

jquery.disable.text.select.pack.js

497 ms

View All Requests

Our browser made a total of 15 requests to load all elements on the main page. We found that 80% of them (12 requests) were addressed to the original Dl.nlv.gov.vn, 13% (2 requests) were made to Google-analytics.com and 7% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Dl.nlv.gov.vn.

Page Optimization Overview & Recommendations

Page size can be reduced by 227.5 kB (65%)

Content Size

352.2 kB

After Optimization

124.8 kB

• HTML
• Images
• JavaScript
• CSS

In fact, the total size of Dl.nlv.gov.vn main page is 352.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Javascripts take 294.8 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 10.2 kB

• Original 12.9 kB
• After minification 10.6 kB
• After compression 2.7 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. This page needs HTML code to be minified as it can gain 2.4 kB, which is 18% 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 10.2 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 17 B

• Original 32.8 kB
• After minification 32.7 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. Dl Nlv images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 208.1 kB

• Original 294.8 kB
• After minification 253.4 kB
• After compression 86.7 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 208.1 kB or 71% of the original size.

CSS Optimization

-78%

Potential reduce by 9.2 kB

• Original 11.7 kB
• After minification 9.9 kB
• After compression 2.6 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. Dl.nlv.gov.vn needs all CSS files to be minified and compressed as it can save up to 9.2 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (57%)

Requests Now

14

After Optimization

6

• AJAX
• Images
• JavaScript
• CSS

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dl Nlv. 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.

Network Requests Diagram

dl.nlv.gov.vn

dl.nlv.gov.vn

1025 ms

vietnam-landing.css

vietnam-landing.css

489 ms

jquery-1.4.4.min.js

jquery-1.4.4.min.js

1229 ms

jquery.cooquery.min.js

jquery.cooquery.min.js

492 ms

jquery.disable.text.select.pack.js

jquery.disable.text.select.pack.js

497 ms

jquery.mousewheel.min.js

jquery.mousewheel.min.js

498 ms

mudim.js

mudim.js

774 ms

keyboard.js

keyboard.js

1963 ms

keyboard.css

keyboard.css

983 ms

vietnam-landing.js

vietnam-landing.js

995 ms

analytics.js

analytics.js

8 ms

collect

collect

27 ms

js

js

61 ms

vietnam_header.jpg

vietnam_header.jpg

499 ms

keyboard.png

keyboard.png

503 ms

Accessibility Review

dl.nlv.gov.vn accessibility score

75

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Form elements do not have associated labels

Best Practices

dl.nlv.gov.vn best practices score

75

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

dl.nlv.gov.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

Page is blocked from indexing

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 Dl.nlv.gov.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 Dl.nlv.gov.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

dl.nlv.gov.vn

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