Access lengoc.vn. Máy chấm công vân tay, máy tuần tra bảo vệ, thẻ cảm ứng

name

value

score

weighting

FCP (First Contentful Paint)

Value5.7 s

5/100

10%

LCP (Largest Contentful Paint)

Value17.9 s

0/100

25%

SI (Speed Index)

Value13.2 s

2/100

10%

TBT (Total Blocking Time)

Value2,470 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.207

60/100

15%

TTI (Time to Interactive)

Value27.6 s

0/100

10%

lengoc.vn

881 ms

index

1107 ms

style.css

768 ms

commons.css

535 ms

jquery-1.7.1.min.js

1421 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 74% of them (58 requests) were addressed to the original Lengoc.vn, 9% (7 requests) were made to Apis.google.com and 4% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (2.8 sec) belongs to the original domain Lengoc.vn.

Content Size

2.5 MB

After Optimization

2.0 MB

In fact, the total size of Lengoc.vn main page is 2.5 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. 40% of websites need less resources to load. Images take 2.1 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 80.9 kB

Original 95.2 kB
After minification 77.1 kB
After compression 14.3 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. This page needs HTML code to be minified as it can gain 18.1 kB, which is 19% 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 80.9 kB or 85% of the original size.

Image Optimization

-9%

Potential reduce by 201.3 kB

Original 2.1 MB
After minification 1.9 MB

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. Lengoc images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 176.3 kB

Original 268.3 kB
After minification 227.8 kB
After compression 92.1 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 176.3 kB or 66% of the original size.

CSS Optimization

-79%

Potential reduce by 20.8 kB

Original 26.3 kB
After minification 20.9 kB
After compression 5.4 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. Lengoc.vn needs all CSS files to be minified and compressed as it can save up to 20.8 kB or 79% of the original size.

Requests Now

After Optimization

The browser has sent 75 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lengoc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

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

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

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

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

High

Tap targets are not sized appropriately

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 Lengoc.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 Lengoc.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

lengoc.vn

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

Máy chấm công vân tay, máy tuần tra bảo vệ, thẻ cảm ứng

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

lengoc.vn

index

style.css

commons.css

jquery-1.7.1.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

lengoc.vn

index

style.css

commons.css

jquery-1.7.1.min.js

jqueryslidemenu.js

autocomplete.js

jquery.colorbox-min.js

wt-rotator.css

jquery.easing.1.3.min.js

jquery.wt-rotator.min.js

frontendhandler.js

high.light.search.js

wz_tooltip.js

b

ga.js

__utm.gif

online

websosanh.png

header1.png

may_cham_cong.png

icon_forum.jpg

icon_contact.jpg

icon_download.jpg

icon_delivery.jpg

bg.png

nav.jpg

nav_icon.png

submenu_bullet_o.gif

btn_search.jpg

loading.gif

May_cham_cong_ronald_jack_K70.jpg

may-cham-cong-van-tay-grangding-gt200.jpg

may-cham-cong-van-tay-gigata-879C.jpg

may-cham-cong-van-tay-ronald-jack-t8.jpg

may-cham-cong-ronald-jack-5000T-C.jpg

may-cham-cong-Promag-TR515ER-MF.jpg

May-cham-cong-Promag-TR515ER.jpg

tron-bo-2-camera-ahd-gia-2-trieu-9-tram.jpg

Camera-Keeper-AHD-720.jpg

Camera-AHD-Keeper-NUD-100WAHD.jpg

Camera-AHD-Keeper-UC-100WAHD.jpg

Camera-AHD-Keeper-NOS-200WAHD.jpg