18.5 sec in total
863 ms
17.5 sec
197 ms
Welcome to cohocvietnam.org.vn homepage info - get ready to check Cohocviet Nam best content right away, or after learning these important things about cohocvietnam.org.vn
Website Hội Cơ Học Việt Nam
Visit cohocvietnam.org.vnWe analyzed Cohocvietnam.org.vn page load time and found that the first response time was 863 ms and then it took 17.6 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.
cohocvietnam.org.vn performance score
name
value
score
weighting
Value7.4 s
1/100
10%
Value12.1 s
0/100
25%
Value13.7 s
2/100
10%
Value140 ms
95/100
30%
Value0.848
4/100
15%
Value10.1 s
26/100
10%
863 ms
1523 ms
4163 ms
618 ms
550 ms
Our browser made a total of 29 requests to load all elements on the main page. We found that 93% of them (27 requests) were addressed to the original Cohocvietnam.org.vn, 7% (2 requests) were made to Opi.yahoo.com. The less responsive or slowest element that took the longest time to load (12.9 sec) belongs to the original domain Cohocvietnam.org.vn.
Page size can be reduced by 114.5 kB (62%)
185.7 kB
71.3 kB
In fact, the total size of Cohocvietnam.org.vn main page is 185.7 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. Only 10% of websites need less resources to load. Images take 115.7 kB which makes up the majority of the site volume.
Potential reduce by 47.1 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 10.4 kB, which is 20% 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 47.1 kB or 90% of the original size.
Potential reduce by 52.8 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, Cohocviet Nam needs image optimization as it can save up to 52.8 kB or 46% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 4.7 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 4.7 kB or 77% of the original size.
Potential reduce by 9.8 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. Cohocvietnam.org.vn needs all CSS files to be minified and compressed as it can save up to 9.8 kB or 86% of the original size.
Number of requests can be reduced by 9 (38%)
24
15
The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cohocviet Nam. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
cohocvietnam.org.vn
863 ms
www.cohocvietnam.org.vn
1523 ms
4163 ms
DUportal.css
618 ms
fadeimages.js
550 ms
logo11.jpg
5009 ms
trans.gif
654 ms
arrow_2.gif
272 ms
vbpl.gif
607 ms
trans.gif
350 ms
group.gif
556 ms
users_online.gif
571 ms
line_tit.jpg
1493 ms
bg.jpg
5360 ms
hanoi-banner-1_7.jpg
6511 ms
hanoi-banner-1_2.jpg
7001 ms
hanoi-banner-1_1.jpg
12855 ms
hanoi-banner-1.jpg
12670 ms
menu.gif
4668 ms
Menu.gif
4957 ms
submenu.gif
5255 ms
title.gif
5547 ms
bgtit.jpg
6128 ms
xemtiep.jpg
6768 ms
arrow.gif
6187 ms
bu_plus.gif
5889 ms
online
86 ms
online
87 ms
spacer.gif
5695 ms
cohocvietnam.org.vn accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Links do not have a discernible name
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
List items (<li>) are not contained within <ul> or <ol> parent elements.
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
cohocvietnam.org.vn best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Issues were logged in the Issues panel in Chrome Devtools
cohocvietnam.org.vn SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Image elements do not have [alt] attributes
Mobile Friendly
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/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
VI
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cohocvietnam.org.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 Cohocvietnam.org.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.
cohocvietnam.org.vn
Open Graph description is not detected on the main page of Cohocviet Nam. 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: