Tools & Wizards About Us
51develop.net screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

51develop.net

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Page Load Speed

47.6 sec in total

First Response

3.7 sec

Resources Loaded

43.5 sec

Page Rendered

387 ms

51develop.net screenshot

About Website

Visit 51develop.net now to see the best up-to-date 51 Develop content and also check out these interesting facts you probably never knew about 51develop.net

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Key Findings

We analyzed 51develop.net page load time and found that the first response time was 3.7 sec and then it took 43.9 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 were 3 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

51develop.net performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value14.2 s

0/100

25%

SI (Speed Index)

Value17.6 s

0/100

10%

TBT (Total Blocking Time)

Value1,380 ms

16/100

30%

CLS (Cumulative Layout Shift)

Value0.105

88/100

15%

TTI (Time to Interactive)

Value14.2 s

9/100

10%

Network Requests Diagram

51develop.net

3689 ms

www.51develop.net

4699 ms

style_1_common.css

7115 ms

style_1_forum_index.css

1111 ms

style.css

1508 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 94% of them (68 requests) were addressed to the original 51develop.net, 4% (3 requests) were made to Tcss.qq.com and 1% (1 request) were made to Discuz.gtimg.cn. The less responsive or slowest element that took the longest time to load (20.3 sec) belongs to the original domain 51develop.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 293.6 kB (64%)

Content Size

456.7 kB

After Optimization

163.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51develop.net main page is 456.7 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 178.7 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 78.8 kB

  • Original 96.2 kB
  • After minification 93.8 kB
  • After compression 17.4 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 78.8 kB or 82% of the original size.

Image Optimization

-46%

Potential reduce by 83.0 kB

  • Original 178.7 kB
  • After minification 95.7 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, 51 Develop needs image optimization as it can save up to 83.0 kB or 46% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-68%

Potential reduce by 69.2 kB

  • Original 101.1 kB
  • After minification 94.3 kB
  • After compression 32.0 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 69.2 kB or 68% of the original size.

CSS Optimization

-78%

Potential reduce by 62.6 kB

  • Original 80.6 kB
  • After minification 78.1 kB
  • After compression 18.0 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. 51develop.net needs all CSS files to be minified and compressed as it can save up to 62.6 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (12%)

Requests Now

67

After Optimization

59

  • Images
  • JavaScript
  • CSS

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Develop. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

51develop.net

51develop.net

3689 ms

www.51develop.net

www.51develop.net

4699 ms

style_1_common.css

style_1_common.css

7115 ms

style_1_forum_index.css

style_1_forum_index.css

1111 ms

style.css

style.css

1508 ms

common.js

common.js

11197 ms

forum.js

forum.js

2288 ms

logging.js

logging.js

5297 ms

md5.js

md5.js

2961 ms

title.js

title.js

3156 ms

ping.js

ping.js

606 ms

discuz_tips.js

discuz_tips.js

614 ms

background.png

background.png

4183 ms

logo.png

logo.png

2172 ms

qq_login.gif

qq_login.gif

1101 ms

wechat_login.png

wechat_login.png

1652 ms

list.gif

list.gif

5018 ms

collapsed_no.gif

collapsed_no.gif

20152 ms

common_13_icon.png

common_13_icon.png

2722 ms

common_52_icon.png

common_52_icon.png

6297 ms

common_59_icon.png

common_59_icon.png

4001 ms

common_133_icon.png

common_133_icon.png

4885 ms

common_91_icon.png

common_91_icon.png

4856 ms

common_92_icon.png

common_92_icon.png

5010 ms

common_15_icon.png

common_15_icon.png

5752 ms

common_16_icon.png

common_16_icon.png

5930 ms

common_134_icon.png

common_134_icon.png

5859 ms

common_104_icon.png

common_104_icon.png

13791 ms

common_63_icon.png

common_63_icon.png

6156 ms

common_64_icon.png

common_64_icon.png

6251 ms

common_105_icon.png

common_105_icon.png

6433 ms

common_118_icon.png

common_118_icon.png

6541 ms

common_131_icon.png

common_131_icon.png

6649 ms

common_143_icon.png

common_143_icon.png

6808 ms

common_30_icon.png

common_30_icon.png

6987 ms

common_69_icon.png

common_69_icon.png

11094 ms

common_35_icon.png

common_35_icon.png

7065 ms

common_8_icon.png

common_8_icon.png

9584 ms

common_68_icon.png

common_68_icon.png

7561 ms

group_99_icon.jpg

group_99_icon.jpg

9518 ms

group_98_icon.jpg

group_98_icon.jpg

8150 ms

group_121_icon.jpg

group_121_icon.jpg

9248 ms

group_135_icon.jpg

group_135_icon.jpg

9782 ms

group_94_icon.jpg

group_94_icon.jpg

11480 ms

group_102_icon.png

group_102_icon.png

12728 ms

group_90_icon.jpg

group_90_icon.jpg

10378 ms

group_123_icon.jpg

group_123_icon.jpg

20140 ms

group_125_icon.jpg

group_125_icon.jpg

13330 ms

ODg2NTEyNw==.js

ODg2NTEyNw==.js

340 ms

ping_hotclick.js

ping_hotclick.js

224 ms

group_103_icon.jpg

group_103_icon.jpg

11272 ms

group_115_icon.jpg

group_115_icon.jpg

12604 ms

group_114_icon.gif

group_114_icon.gif

16560 ms

group_116_icon.jpg

group_116_icon.jpg

11517 ms

group_126_icon.jpg

group_126_icon.jpg

17088 ms

ad_close.gif

ad_close.gif

10493 ms

plugin.php

plugin.php

9939 ms

site_qq.jpg

site_qq.jpg

10195 ms

security.png

security.png

11495 ms

switch_width.png

switch_width.png

10538 ms

px.png

px.png

15835 ms

pn.png

pn.png

11085 ms

nv.png

nv.png

12769 ms

qmenu.png

qmenu.png

12983 ms

nv_a.png

nv_a.png

14676 ms

search.png

search.png

13274 ms

search.png

search.png

13580 ms

pt_item.png

pt_item.png

13934 ms

chart.png

chart.png

16588 ms

listbg.gif

listbg.gif

20335 ms

thead.png

thead.png

15018 ms

scrolltop.png

scrolltop.png

14571 ms

Accessibility Review

51develop.net accessibility score

81

Accessibility Issues

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

High

Links do not have a discernible name

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

51develop.net best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

51develop.net SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

High

Page is blocked from indexing

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    GBK

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51develop.net 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 51develop.net main page’s claimed encoding is gbk. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

51develop.net

Open Graph description is not detected on the main page of 51 Develop. 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: