25.8 sec in total
4.4 sec
21.1 sec
364 ms
Welcome to vckbase.com homepage info - get ready to check Vckbase best content for China right away, or after learning these important things about vckbase.com
VC知识库成立14年来,一直把提升程序员的能力作为自己的使命!视频大讲堂在两年内将打造成中国最丰富最专业的在线培训平台。
Visit vckbase.comWe analyzed Vckbase.com page load time and found that the first response time was 4.4 sec and then it took 21.4 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. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.
vckbase.com performance score
name
value
score
weighting
Value3.1 s
46/100
10%
Value5.0 s
27/100
25%
Value10.8 s
7/100
10%
Value200 ms
89/100
30%
Value0
100/100
15%
Value4.4 s
83/100
10%
4384 ms
1116 ms
3046 ms
1604 ms
3378 ms
Our browser made a total of 57 requests to load all elements on the main page. We found that 86% of them (49 requests) were addressed to the original Vckbase.com, 4% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to S9.cnzz.com. The less responsive or slowest element that took the longest time to load (19.5 sec) belongs to the original domain Vckbase.com.
Page size can be reduced by 146.3 kB (37%)
400.3 kB
254.0 kB
In fact, the total size of Vckbase.com main page is 400.3 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. 20% of websites need less resources to load. Images take 247.5 kB which makes up the majority of the site volume.
Potential reduce by 27.2 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 7.1 kB, which is 21% 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 27.2 kB or 80% of the original size.
Potential reduce by 38.6 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. Obviously, Vckbase needs image optimization as it can save up to 38.6 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 7.6 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 7.6 kB or 26% of the original size.
Potential reduce by 72.9 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. Vckbase.com needs all CSS files to be minified and compressed as it can save up to 72.9 kB or 81% of the original size.
Number of requests can be reduced by 17 (31%)
54
37
The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vckbase. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
vckbase.com
4384 ms
base.css
1116 ms
home.css
3046 ms
homebase.css
1604 ms
right.css
3378 ms
jquery.js
3412 ms
vckbase.js
2005 ms
logo.png
10588 ms
menubg.png
11449 ms
icon1big.png
5115 ms
icon2big.png
3536 ms
questIcon.gif
6620 ms
headtab_03.gif
4377 ms
headtab_07.gif
6222 ms
thum_img_20130426162847.png
8355 ms
860X100.jpg
19539 ms
shell.jpg
14694 ms
%E4%BA%91%E5%B9%B3%E5%8F%B0.png
13457 ms
thum_img_20131212100711.jpg
7790 ms
thum_img_20131203155234.png
11008 ms
thum_img_20131129100407.png
12124 ms
thum_img_20131128103344.png
14343 ms
thum_img_20131122132753.png
12903 ms
thum_img_20131121103703.png
13341 ms
thum_img_20131120100909.png
14215 ms
thum_img_20131119094843.png
15769 ms
vckbase.com
14186 ms
video_index.png
14400 ms
jian.gif
1435 ms
news.gif
1599 ms
hot.gif
3057 ms
icon2big.png
1597 ms
stat.php
1083 ms
rightbg.png
13631 ms
footerLogo.png
15154 ms
headbgindex.gif
13750 ms
menu_hover.gif
13336 ms
searchbg.gif
13444 ms
homecontentbg.gif
13811 ms
hometitle.gif
14636 ms
dashed_line.gif
14221 ms
titleline.gif
14283 ms
righticon2.gif
15723 ms
righticonv.gif
15177 ms
pmicon.gif
14754 ms
righticon0.gif
15037 ms
footerbg.gif
15054 ms
footericon.gif
15224 ms
footersearchbg.gif
15422 ms
stat.htm
405 ms
core.php
1362 ms
9.gif
1009 ms
pic.gif
799 ms
ga.js
66 ms
__utm.gif
32 ms
app.gif
746 ms
nvimg1.jpg
3198 ms
vckbase.com accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
ARIA input fields do not have accessible names
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
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
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
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.
vckbase.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
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
vckbase.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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 Vckbase.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 Vckbase.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.
vckbase.com
Open Graph description is not detected on the main page of Vckbase. 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: