Tools & Wizards About Us
arduino.cn screenshot

Report Summary

  • 91

    Performance

    Renders faster than
    91% of other websites

  • 51

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

arduino.cn

Arduino爱好者 - Powered by Discuz!

Page Load Speed

63.3 sec in total

First Response

12.2 sec

Resources Loaded

50.7 sec

Page Rendered

332 ms

arduino.cn screenshot

About Website

Click here to check amazing Arduino content for China. Otherwise, check out these important facts you probably never knew about arduino.cn

Arduino爱好者分享arduino相关文档、项目

Visit arduino.cn

Key Findings

We analyzed Arduino.cn page load time and found that the first response time was 12.2 sec and then it took 51 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 6 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

arduino.cn performance score

91

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

76/100

10%

LCP (Largest Contentful Paint)

Value2.3 s

93/100

25%

SI (Speed Index)

Value5.6 s

53/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.3 s

99/100

10%

Network Requests Diagram

www.arduino.cn

12244 ms

wb.js

25 ms

style_16_common.css

12514 ms

style_16_forum_index.css

954 ms

common.js

12623 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 61% of them (44 requests) were addressed to the original Arduino.cn, 8% (6 requests) were made to Widget.weibo.com and 6% (4 requests) were made to Tjs.sjs.sinajs.cn. The less responsive or slowest element that took the longest time to load (20.1 sec) belongs to the original domain Arduino.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 205.9 kB (55%)

Content Size

376.1 kB

After Optimization

170.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Arduino.cn main page is 376.1 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. 25% of websites need less resources to load. Javascripts take 249.8 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 50.1 kB

  • Original 64.4 kB
  • After minification 63.5 kB
  • After compression 14.3 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 50.1 kB or 78% of the original size.

Image Optimization

-16%

Potential reduce by 7.9 kB

  • Original 50.8 kB
  • After minification 42.9 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, Arduino needs image optimization as it can save up to 7.9 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-56%

Potential reduce by 139.8 kB

  • Original 249.8 kB
  • After minification 223.3 kB
  • After compression 110.0 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 139.8 kB or 56% of the original size.

CSS Optimization

-72%

Potential reduce by 8.0 kB

  • Original 11.1 kB
  • After minification 11.0 kB
  • After compression 3.0 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. Arduino.cn needs all CSS files to be minified and compressed as it can save up to 8.0 kB or 72% of the original size.

Requests Breakdown

Number of requests can be reduced by 35 (55%)

Requests Now

64

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 64 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Arduino. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

www.arduino.cn

www.arduino.cn

12244 ms

wb.js

wb.js

25 ms

style_16_common.css

style_16_common.css

12514 ms

style_16_forum_index.css

style_16_forum_index.css

954 ms

common.js

common.js

12623 ms

jquery.1.4.2.min.js

jquery.1.4.2.min.js

20139 ms

msclass.js

msclass.js

2318 ms

forum.js

forum.js

4758 ms

logging.js

logging.js

1043 ms

forum_slide.js

forum_slide.js

1097 ms

jianfan02.js

jianfan02.js

4574 ms

ping.js

ping.js

530 ms

discuz_tips.js

discuz_tips.js

542 ms

logo.png

logo.png

19992 ms

qq_login.gif

qq_login.gif

2510 ms

weibo_login.png

weibo_login.png

385 ms

wechat_login.png

wechat_login.png

3227 ms

proteus20160217.jpg

proteus20160217.jpg

15716 ms

mostfun101.jpg

mostfun101.jpg

10749 ms

intel20160218.jpg

intel20160218.jpg

3493 ms

collapsed_no.gif

collapsed_no.gif

3971 ms

forum_new.gif

forum_new.gif

3786 ms

forum.gif

forum.gif

3960 ms

collapsed_yes.gif

collapsed_yes.gif

4307 ms

pic_nv_prev.gif

pic_nv_prev.gif

4385 ms

pic_nv_next.gif

pic_nv_next.gif

4413 ms

ad_close.gif

ad_close.gif

4849 ms

plugin.php

plugin.php

4849 ms

security.png

security.png

4847 ms

csdncode.png

csdncode.png

7636 ms

qcloud.png

qcloud.png

9093 ms

switch_width.png

switch_width.png

7920 ms

newarow.gif

newarow.gif

8144 ms

bg.menu.png

bg.menu.png

9153 ms

delimiter.bg.menu.png

delimiter.bg.menu.png

9576 ms

search.png

search.png

9498 ms

pt_item.png

pt_item.png

11309 ms

chart.png

chart.png

9929 ms

category_lbg.png

category_lbg.png

10110 ms

tb.png

tb.png

10424 ms

loading.gif

loading.gif

10636 ms

111132vogehmq5rrqrh7ve.jpg

111132vogehmq5rrqrh7ve.jpg

19832 ms

173342jz6o052q585jjfnn.jpg

173342jz6o052q585jjfnn.jpg

19830 ms

204441tfdgeceeg6q9qrt9.png

204441tfdgeceeg6q9qrt9.png

19830 ms

235749mqd8p6d66n88hpqz.jpg

235749mqd8p6d66n88hpqz.jpg

19829 ms

dot.gif

dot.gif

17319 ms

toss_11.gif

toss_11.gif

242 ms

ODg5OTgwMg==.js

ODg5OTgwMg==.js

489 ms

h.js

h.js

2355 ms

21.gif

21.gif

814 ms

hm.gif

hm.gif

371 ms

scrolltop.png

scrolltop.png

15341 ms

loading1.gif

loading1.gif

20 ms

bundle.js

bundle.js

21 ms

client.js

client.js

7 ms

iframeWidget.js

iframeWidget.js

10 ms

aj_relationship.php

aj_relationship.php

998 ms

aj_relationship.php

aj_relationship.php

2060 ms

aj_relationship.php

aj_relationship.php

2059 ms

aj_relationship.php

aj_relationship.php

2054 ms

followbutton.php

followbutton.php

1062 ms

followbutton.php

followbutton.php

1136 ms

followButton.css

followButton.css

21 ms

sso.js

sso.js

18 ms

followButton.js

followButton.js

17 ms

suda.js

suda.js

16 ms

b.gif

b.gif

879 ms

bg_flbtn.png

bg_flbtn.png

4 ms

icon_user.png

icon_user.png

7 ms

shell_v2.js

shell_v2.js

3837 ms

logger.js

logger.js

412 ms

bds_s_v2.js

bds_s_v2.js

6467 ms

Accessibility Review

arduino.cn accessibility score

51

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<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

High

Image elements do not have [alt] attributes

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

arduino.cn best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

arduino.cn SEO score

92

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Arduino.cn 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 Arduino.cn 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.

Social Sharing Optimization

arduino.cn

Open Graph description is not detected on the main page of Arduino. 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: