20.1 sec in total
1.1 sec
18.9 sec
135 ms
Visit opclass.com now to see the best up-to-date Opclass content for China and also check out these interesting facts you probably never knew about opclass.com
Visit opclass.comWe analyzed Opclass.com page load time and found that the first response time was 1.1 sec and then it took 19 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.
opclass.com performance score
name
value
score
weighting
Value4.3 s
17/100
10%
Value5.6 s
17/100
25%
Value8.5 s
18/100
10%
Value60 ms
100/100
30%
Value0.005
100/100
15%
Value6.1 s
63/100
10%
1082 ms
2316 ms
4533 ms
1905 ms
13193 ms
Our browser made a total of 28 requests to load all elements on the main page. We found that 25% of them (7 requests) were addressed to the original Opclass.com, 18% (5 requests) were made to Ww4.sinaimg.cn and 14% (4 requests) were made to Ww2.sinaimg.cn. The less responsive or slowest element that took the longest time to load (13.2 sec) belongs to the original domain Opclass.com.
Page size can be reduced by 308.3 kB (26%)
1.2 MB
872.7 kB
In fact, the total size of Opclass.com main page is 1.2 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 839.9 kB which makes up the majority of the site volume.
Potential reduce by 81.4 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 81.4 kB or 86% of the original size.
Potential reduce by 41.6 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. Opclass images are well optimized though.
Potential reduce by 78.7 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 78.7 kB or 67% of the original size.
Potential reduce by 106.7 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. Opclass.com needs all CSS files to be minified and compressed as it can save up to 106.7 kB or 83% of the original size.
Number of requests can be reduced by 5 (20%)
25
20
The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opclass. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.
opclass.com
1082 ms
www.opclass.com
2316 ms
bootstrap.min.css
4533 ms
site.css
1905 ms
jquery.js
13193 ms
bootstrap.min.js
1145 ms
masonry.pkgd.min.js
5520 ms
imagesloaded.pkgd.min.js
5475 ms
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444 ms
glyphicons-halflings-regular.woff
2452 ms
hm.js
847 ms
analytics.js
8 ms
collect
14 ms
hm.gif
326 ms
opclass.com 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.
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
opclass.com 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
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
opclass.com SEO score
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
ZH
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Opclass.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 Opclass.com 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.
opclass.com
Open Graph description is not detected on the main page of Opclass. 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: