11.8 sec in total
3.7 sec
7.9 sec
187 ms
Click here to check amazing Ir Las content for China. Otherwise, check out these important facts you probably never knew about ir.las.ac.cn
Visit ir.las.ac.cnWe analyzed Ir.las.ac.cn page load time and found that the first response time was 3.7 sec and then it took 8.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
ir.las.ac.cn performance score
name
value
score
weighting
Value15.4 s
0/100
10%
Value21.2 s
0/100
25%
Value24.2 s
0/100
10%
Value3,920 ms
1/100
30%
Value0.311
38/100
15%
Value22.6 s
1/100
10%
3705 ms
8 ms
1447 ms
495 ms
743 ms
Our browser made a total of 61 requests to load all elements on the main page. We found that 97% of them (59 requests) were addressed to the original Ir.las.ac.cn, 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (3.7 sec) belongs to the original domain Ir.las.ac.cn.
Page size can be reduced by 1.2 MB (59%)
2.0 MB
826.1 kB
In fact, the total size of Ir.las.ac.cn main page is 2.0 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. 30% of websites need less resources to load. Javascripts take 1.4 MB which makes up the majority of the site volume.
Potential reduce by 80.2 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 18.7 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 80.2 kB or 82% of the original size.
Potential reduce by 209.4 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, Ir Las needs image optimization as it can save up to 209.4 kB or 43% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 860.9 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 860.9 kB or 62% of the original size.
Potential reduce by 26.9 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. Ir.las.ac.cn needs all CSS files to be minified and compressed as it can save up to 26.9 kB or 80% of the original size.
Number of requests can be reduced by 33 (56%)
59
26
The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ir Las. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
ir.las.ac.cn
3705 ms
ga.js
8 ms
styles.css.jsp
1447 ms
cmxform.css
495 ms
jquery.bettertip.css
743 ms
jquery.min.js
1794 ms
jquery.validate.js
1332 ms
messages_cn.js
742 ms
jquery.bettertip.custom.js
1232 ms
common.js
988 ms
jquery.treeview.css
1235 ms
jquery.cookie.js
1485 ms
jquery.treeview.js
1728 ms
ckeditor.js
3194 ms
jquery.pager.js
1684 ms
artDialog.js
1980 ms
jquery.form.js
2165 ms
utils.js
2469 ms
jquery-ui.min.js
2045 ms
jquery-ui.css
2470 ms
jquery.autocomplete.js
2301 ms
__utm.gif
11 ms
echarts-plain-map.js
2534 ms
jquery.switchable-2.0.min.js
243 ms
blue.css
251 ms
logo.jpg
1206 ms
transparent.gif
247 ms
login_expand.png
990 ms
indicator.gif
268 ms
captcha
529 ms
what.gif
493 ms
indexnav.png
789 ms
arrow.gif
727 ms
index_left_07.gif
774 ms
titlebg.jpg
973 ms
arrow2.png
1650 ms
arrow1.png
1055 ms
index_01_03.gif
1173 ms
index_01_14.gif
1179 ms
index_01_19.gif
1277 ms
index_01_23.gif
1388 ms
index_author.gif
1418 ms
12502-000710.gif
1426 ms
12502-000013.jpg
1604 ms
12502-000251.JPG
1629 ms
12502-000042.jpg
2893 ms
nopic.gif
1676 ms
12502-000162.jpg
1739 ms
12502-000001.jpg
1749 ms
index_02.gif
1807 ms
sum.gif
1876 ms
index_0a.gif
1919 ms
rightbg3.gif
1989 ms
arrow.gif
2004 ms
rss2.gif
2074 ms
atom.png
2114 ms
valid-xhtml10.png
2169 ms
shadow.png
642 ms
ui-bg_highlight-soft_100_eeeeee_1x100.png
665 ms
navigator.png
739 ms
print.css
256 ms
ir.las.ac.cn accessibility score
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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Form elements do not have associated labels
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
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.
ir.las.ac.cn 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
Missing source maps for large first-party JavaScript
ir.las.ac.cn 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
Document uses plugins
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ir.las.ac.cn can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Ir.las.ac.cn 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.
ir.las.ac.cn
Open Graph description is not detected on the main page of Ir Las. 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: