23.6 sec in total
875 ms
22.1 sec
593 ms
Welcome to 521ad.com homepage info - get ready to check 521 Ad best content right away, or after learning these important things about 521ad.com
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Visit 521ad.comWe analyzed 521ad.com page load time and found that the first response time was 875 ms and then it took 22.7 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.
521ad.com performance score
name
value
score
weighting
Value2.5 s
66/100
10%
Value2.5 s
89/100
25%
Value7.3 s
29/100
10%
Value10 ms
100/100
30%
Value0.142
78/100
15%
Value2.7 s
97/100
10%
875 ms
237 ms
469 ms
935 ms
471 ms
Our browser made a total of 17 requests to load all elements on the main page. We found that 82% of them (14 requests) were addressed to the original 521ad.com, 12% (2 requests) were made to Iwanshow.com and 6% (1 request) were made to Staic.zcit.net. The less responsive or slowest element that took the longest time to load (20.4 sec) relates to the external source Staic.zcit.net.
Page size can be reduced by 30.0 kB (4%)
757.9 kB
727.9 kB
In fact, the total size of 521ad.com main page is 757.9 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. 15% of websites need less resources to load. Images take 690.9 kB which makes up the majority of the site volume.
Potential reduce by 12.4 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 12.4 kB or 74% of the original size.
Potential reduce by 6.8 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. 521 Ad images are well optimized though.
Potential reduce by 10.2 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 10.2 kB or 22% of the original size.
Potential reduce by 550 B
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. 521ad.com needs all CSS files to be minified and compressed as it can save up to 550 B or 17% of the original size.
We found no issues to fix!
12
12
The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 521 Ad. According to our analytics all requests are already optimized.
www.521ad.com
875 ms
animate.css
237 ms
css.css
469 ms
jquery-1.9.1.min.js
935 ms
jquery.SuperSlide.2.1.1.js
471 ms
baidu_js_push.js
20386 ms
ff82150bb081decedd2fefcdb6cf65bd.png
368 ms
61a7c28643773e233c782701f28b19b1.jpg
1860 ms
f979864cd3522e767d0d767484facf02.jpg
1613 ms
NTIxYWQuY29t
748 ms
news_02_l326.png
275 ms
102_elci.jpg
1785 ms
about_07_h9wf.png
383 ms
news_06_fiuh.png
457 ms
nav_bg_d0jy.png
464 ms
top.png
1078 ms
NTIxYWQuY29t
2802 ms
521ad.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.
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
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.
521ad.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
521ad.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
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
ZH
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 521ad.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 521ad.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.
521ad.com
Open Graph description is not detected on the main page of 521 Ad. 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: