3.2 sec in total
835 ms
1.9 sec
439 ms
Visit class123.ac now to see the best up-to-date Class123 content for China and also check out these interesting facts you probably never knew about class123.ac
The best tool for classroom management and flipped classroom. Start buliding a happy classroom community!
Visit class123.acWe analyzed Class123.ac page load time and found that the first response time was 835 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
class123.ac performance score
name
value
score
weighting
Value4.1 s
21/100
10%
Value8.0 s
2/100
25%
Value7.0 s
32/100
10%
Value1,040 ms
26/100
30%
Value0
100/100
15%
Value13.2 s
12/100
10%
835 ms
63 ms
75 ms
223 ms
230 ms
Our browser made a total of 34 requests to load all elements on the main page. We found that 6% of them (2 requests) were addressed to the original Class123.ac, 53% (18 requests) were made to Cdn.class123.kr and 9% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (835 ms) belongs to the original domain Class123.ac.
Page size can be reduced by 825.8 kB (68%)
1.2 MB
396.5 kB
In fact, the total size of Class123.ac 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. 60% of websites need less resources to load. CSS take 498.5 kB which makes up the majority of the site volume.
Potential reduce by 33.1 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. 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 33.1 kB or 80% of the original size.
Potential reduce by 124.8 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, Class123 needs image optimization as it can save up to 124.8 kB or 39% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 230.8 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 230.8 kB or 64% of the original size.
Potential reduce by 437.1 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. Class123.ac needs all CSS files to be minified and compressed as it can save up to 437.1 kB or 88% of the original size.
Number of requests can be reduced by 20 (65%)
31
11
The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Class123. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
class123.ac
835 ms
css
63 ms
css
75 ms
normalize.v.css
223 ms
jquery.js
230 ms
jquery.cookie.js
242 ms
jquery.history.js
242 ms
jquery-ui.js
262 ms
en.js
249 ms
lang.js
224 ms
home.v.css
293 ms
layout.v.css
246 ms
number.v.css
248 ms
jquery-ui.v.css
248 ms
lang.v.css
249 ms
class123.util.js
248 ms
class123.member.js
246 ms
analytics.js
71 ms
fbevents.js
208 ms
img_loading_70.png
210 ms
cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf
51 ms
k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf
52 ms
sp_logo.png
21 ms
sp_guide_old_ie.png
21 ms
136585096
78 ms
bg-introduction.png
31 ms
bg_home.png
8 ms
collect
26 ms
collect
35 ms
player.js
94 ms
player.css
65 ms
ga.js
31 ms
vuid.min.js
92 ms
__utm.gif
37 ms
class123.ac 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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
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
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.
class123.ac 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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
class123.ac SEO score
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
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Class123.ac can be misinterpreted by Google and other search engines. Our service has detected that English 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 Class123.ac 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.
class123.ac
Open Graph data is detected on the main page of Class123. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: