31.2 sec in total
2.5 sec
28.3 sec
335 ms
Welcome to open.freebuf.com homepage info - get ready to check Open Free Buf best content for China right away, or after learning these important things about open.freebuf.com
FreeBuf黑客与极客,国内关注度最高的全球互联网安全媒体平台,同时也是爱好者们交流与分享安全技术的最佳社区。
Visit open.freebuf.comWe analyzed Open.freebuf.com page load time and found that the first response time was 2.5 sec and then it took 28.7 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.
open.freebuf.com performance score
name
value
score
weighting
Value5.8 s
5/100
10%
Value11.2 s
0/100
25%
Value11.0 s
6/100
10%
Value30 ms
100/100
30%
Value0.249
50/100
15%
Value7.7 s
45/100
10%
2540 ms
805 ms
1306 ms
810 ms
1596 ms
Our browser made a total of 55 requests to load all elements on the main page. We found that 47% of them (26 requests) were addressed to the original Open.freebuf.com, 33% (18 requests) were made to Static.freebuf.com and 5% (3 requests) were made to Player.youku.com. The less responsive or slowest element that took the longest time to load (19.8 sec) belongs to the original domain Open.freebuf.com.
Page size can be reduced by 49.1 kB (23%)
211.9 kB
162.8 kB
In fact, the total size of Open.freebuf.com main page is 211.9 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. 20% of websites need less resources to load. Images take 164.6 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. This page needs HTML code to be minified as it can gain 4.7 kB, which is 12% 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 33.1 kB or 84% of the original size.
Potential reduce by 13.4 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. Open Free Buf images are well optimized though.
Potential reduce by 1.6 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 1.6 kB or 31% of the original size.
Potential reduce by 1.0 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. Open.freebuf.com needs all CSS files to be minified and compressed as it can save up to 1.0 kB or 40% of the original size.
Number of requests can be reduced by 27 (51%)
53
26
The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Open Free Buf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.
open.freebuf.com
2540 ms
style.css
805 ms
default.css
1306 ms
jquery.fancybox.css
810 ms
custom.css
1596 ms
shortcodes.css
1005 ms
wp-recentcomments.css
5692 ms
widget.css
1049 ms
jquery.min.js
11797 ms
shortcodes.js
1234 ms
jquery-ui.min.js
19820 ms
superfish.js
1545 ms
jquery.fancybox.js
2605 ms
html5.js
1780 ms
custom.js
2068 ms
bcloud.js
2511 ms
wp-recentcomments-jquery.js
2801 ms
logo1.png
1627 ms
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1069 ms
quotel.png
5849 ms
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1595 ms
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wykk01.jpg
2670 ms
bg-line.png
387 ms
seperator.png
905 ms
ico-search.png
622 ms
css.php
453 ms
quoter.png
5830 ms
freebufrobot.png
5916 ms
bcloud.js
256 ms
ico-square.png
422 ms
ico-rss.png
449 ms
ico-play.png
526 ms
yk.8.png
1383 ms
dot.png
793 ms
ico-list.png
779 ms
logo80-25.png
1606 ms
h.js
1792 ms
jsapi
2035 ms
hm.gif
296 ms
play.css
1912 ms
open.freebuf.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.
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
<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
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
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
Links do not have a discernible name
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.
open.freebuf.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
Page has valid source maps
open.freebuf.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
robots.txt is not valid
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
ZH
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Open.freebuf.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it matches the claimed language. Our system also found out that Open.freebuf.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.
open.freebuf.com
Open Graph description is not detected on the main page of Open Free Buf. 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: