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developer.alibabacloud.com screenshot

Report Summary

  • 3

    Performance

    Renders faster than
    20% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 49% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 76

    SEO

    Google-friendlier than
    35% of websites

developer.alibabacloud.com

Apsara Developer Community - Alibaba Cloud

Page Load Speed

9.4 sec in total

First Response

472 ms

Resources Loaded

8.4 sec

Page Rendered

579 ms

developer.alibabacloud.com screenshot

About Website

Visit developer.alibabacloud.com now to see the best up-to-date Developer Alibaba Cloud content for China and also check out these interesting facts you probably never knew about developer.alibabacloud.com

Your Source for the most advanced community resources and developer content.

Visit developer.alibabacloud.com

Key Findings

We analyzed Developer.alibabacloud.com page load time and found that the first response time was 472 ms and then it took 9 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

developer.alibabacloud.com performance score

3

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.3 s

3/100

10%

LCP (Largest Contentful Paint)

Value14.9 s

0/100

25%

SI (Speed Index)

Value12.8 s

3/100

10%

TBT (Total Blocking Time)

Value2,100 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value1.71

0/100

15%

TTI (Time to Interactive)

Value20.6 s

2/100

10%

Network Requests Diagram

developer.alibabacloud.com

472 ms

developer.alibabacloud.com

950 ms

developer

869 ms

developer

301 ms

122 ms

Our browser made a total of 98 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Developer.alibabacloud.com, 34% (33 requests) were made to Img.alicdn.com and 19% (19 requests) were made to G.alicdn.com. The less responsive or slowest element that took the longest time to load (4.6 sec) relates to the external source Img.alicdn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (32%)

Content Size

3.3 MB

After Optimization

2.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Developer.alibabacloud.com main page is 3.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Javascripts take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 805.2 kB

  • Original 941.0 kB
  • After minification 780.6 kB
  • After compression 135.8 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 160.4 kB, which is 17% 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 805.2 kB or 86% of the original size.

Image Optimization

-0%

Potential reduce by 2.3 kB

  • Original 1.0 MB
  • After minification 1.0 MB

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. Developer Alibaba Cloud images are well optimized though.

JavaScript Optimization

-20%

Potential reduce by 236.0 kB

  • Original 1.2 MB
  • After minification 1.2 MB
  • After compression 947.6 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 236.0 kB or 20% of the original size.

CSS Optimization

-17%

Potential reduce by 22.4 kB

  • Original 131.9 kB
  • After minification 131.8 kB
  • After compression 109.4 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. Developer.alibabacloud.com needs all CSS files to be minified and compressed as it can save up to 22.4 kB or 17% of the original size.

Requests Breakdown

Number of requests can be reduced by 51 (56%)

Requests Now

91

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 91 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Developer Alibaba Cloud. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 32 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

developer.alibabacloud.com

developer.alibabacloud.com

472 ms

developer.alibabacloud.com

developer.alibabacloud.com

950 ms

developer

developer

869 ms

developer

developer

301 ms

122 ms

95 ms

177 ms

font_274588_3h2v001vxq2.css

font_274588_3h2v001vxq2.css

92 ms

g.alicdn.com

g.alicdn.com

167 ms

index.js

index.js

235 ms

nc.css

nc.css

19 ms

nc.js

nc.js

21 ms

index.js

index.js

136 ms

uab.js

uab.js

746 ms

um.js

um.js

705 ms

font_263210_o1lh2xbpd7n.css

font_263210_o1lh2xbpd7n.css

11 ms

web-track-browser.js

web-track-browser.js

3 ms

215 ms

index.js

index.js

44 ms

aplus_int.js

aplus_int.js

54 ms

O1CN01MyJN0T1lebPOIz6R4_!!6000000004844-0-tps-2880-120.jpg_.webp

O1CN01MyJN0T1lebPOIz6R4_!!6000000004844-0-tps-2880-120.jpg_.webp

528 ms

O1CN01zi97Bl1MwaNFDShZS_!!6000000001499-55-tps-14-11.svg

O1CN01zi97Bl1MwaNFDShZS_!!6000000001499-55-tps-14-11.svg

689 ms

O1CN01JLhpO31Pr2cQNNeyr_!!6000000001893-0-tps-800-120.jpg_.webp

O1CN01JLhpO31Pr2cQNNeyr_!!6000000001893-0-tps-800-120.jpg_.webp

529 ms

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O1CN01N1suDj25xdzN40MQ3_!!6000000007593-2-tps-72-36.png_.webp

654 ms

TB1MyartET1gK0jSZFrXXcNCXXa-318-40.png_.webp

TB1MyartET1gK0jSZFrXXcNCXXa-318-40.png_.webp

531 ms

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TB1_z9xtqL7gK0jSZFBXXXZZpXa-80-80.png_.webp

529 ms

TB1oPiCtET1gK0jSZFhXXaAtVXa-80-80.png_.webp

TB1oPiCtET1gK0jSZFhXXaAtVXa-80-80.png_.webp

532 ms

TB1HcqCtxn1gK0jSZKPXXXvUXXa-80-80.png_.webp

TB1HcqCtxn1gK0jSZKPXXXvUXXa-80-80.png_.webp

532 ms

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TB1CIiBtuL2gK0jSZPhXXahvXXa-80-80.png_.webp

532 ms

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TB1FHWcB7P2gK0jSZPxXXacQpXa-130-36.png_.webp

533 ms

TB1AveGtAT2gK0jSZFkXXcIQFXa-80-80.png_.webp

TB1AveGtAT2gK0jSZFkXXcIQFXa-80-80.png_.webp

536 ms

TB1oIeDtAL0gK0jSZFAXXcA9pXa-80-80.png_.webp

TB1oIeDtAL0gK0jSZFAXXcA9pXa-80-80.png_.webp

534 ms

TB1XZCiBYj1gK0jSZFuXXcrHpXa-114-32.png_.webp

TB1XZCiBYj1gK0jSZFuXXcrHpXa-114-32.png_.webp

534 ms

TB1brLboOpE_u4jSZKbXXbCUVXa-32-32.png_.webp

TB1brLboOpE_u4jSZKbXXbCUVXa-32-32.png_.webp

536 ms

TB1tpuJ2UT1gK0jSZFrXXcNCXXa-36-36.png_.webp

TB1tpuJ2UT1gK0jSZFrXXcNCXXa-36-36.png_.webp

577 ms

eg.js

eg.js

1193 ms

O1CN011rRXBB1NfTMX4MnHk_!!6000000001597-0-tps-4680-1400.jpg

O1CN011rRXBB1NfTMX4MnHk_!!6000000001597-0-tps-4680-1400.jpg

4578 ms

O1CN01GqiiPj1sc2TwOgYgX_!!6000000005786-2-tps-620-96.png

O1CN01GqiiPj1sc2TwOgYgX_!!6000000005786-2-tps-620-96.png

604 ms

font_263210_i8z97k1vy8.woff

font_263210_i8z97k1vy8.woff

19 ms

en

en

391 ms

font_263210_o1lh2xbpd7n.woff

font_263210_o1lh2xbpd7n.woff

199 ms

is_login

is_login

1096 ms

en.json

en.json

724 ms

en.json

en.json

722 ms

grayAbTestAISearch

grayAbTestAISearch

676 ms

g.alicdn.com

g.alicdn.com

188 ms

g.alicdn.com

g.alicdn.com

186 ms

is_login.json

is_login.json

981 ms

getAB

getAB

974 ms

O1CN01s4WLiq1bQjFAvFOOf_!!6000000003460-0-tps-2048-2048.jpg

O1CN01s4WLiq1bQjFAvFOOf_!!6000000003460-0-tps-2048-2048.jpg

88 ms

O1CN01Tnvmtv1OAcIHku9PL_!!6000000001665-0-tps-900-940.jpg_.webp

O1CN01Tnvmtv1OAcIHku9PL_!!6000000001665-0-tps-900-940.jpg_.webp

308 ms

O1CN01RVU6H31yFx4jDvtNh_!!6000000006550-0-tps-900-400.jpg_.webp

O1CN01RVU6H31yFx4jDvtNh_!!6000000006550-0-tps-900-400.jpg_.webp

494 ms

O1CN01rhvyrX26CIqad5hc0_!!6000000007625-0-tps-900-400.jpg_.webp

O1CN01rhvyrX26CIqad5hc0_!!6000000007625-0-tps-900-400.jpg_.webp

759 ms

O1CN01ZqenIE1SBlkeDX6Cw_!!6000000002209-0-tps-900-400.jpg_.webp

O1CN01ZqenIE1SBlkeDX6Cw_!!6000000002209-0-tps-900-400.jpg_.webp

448 ms

O1CN01Y8dyDa1YI4u6qUTYH_!!6000000003035-0-tps-620-1370.jpg_.webp

O1CN01Y8dyDa1YI4u6qUTYH_!!6000000003035-0-tps-620-1370.jpg_.webp

760 ms

O1CN01ZrfrTD1RQ8ag51eIF_!!6000000002105-0-tps-666-1742.jpg_.webp

O1CN01ZrfrTD1RQ8ag51eIF_!!6000000002105-0-tps-666-1742.jpg_.webp

448 ms

O1CN01CMEtev22sf096Mxuj_!!6000000007176-2-tps-96-96.png

O1CN01CMEtev22sf096Mxuj_!!6000000007176-2-tps-96-96.png

463 ms

O1CN01J3IEph1dhnCwBJedx_!!6000000003768-2-tps-96-96.png

O1CN01J3IEph1dhnCwBJedx_!!6000000003768-2-tps-96-96.png

503 ms

O1CN01vrCNtC1YPPEFi7zFB_!!6000000003051-2-tps-96-96.png

O1CN01vrCNtC1YPPEFi7zFB_!!6000000003051-2-tps-96-96.png

538 ms

TB1Z0OfBxnaK1RjSZFtXXbC2VXa-3200-496.jpg_.webp

TB1Z0OfBxnaK1RjSZFtXXbC2VXa-3200-496.jpg_.webp

1203 ms

getToken.htm

getToken.htm

1115 ms

get_csrf_token.json

get_csrf_token.json

928 ms

g.alicdn.com

g.alicdn.com

40 ms

css.min.js

css.min.js

29 ms

notice

notice

264 ms

g.alicdn.com

g.alicdn.com

84 ms

loading.gif

loading.gif

3 ms

i18n.js

i18n.js

5 ms

utils.js

utils.js

3 ms

collina.js

collina.js

280 ms

common.js

common.js

3 ms

common.js

common.js

3 ms

TB1cad8oQcx_u4jSZFlXXXnUFXa-32-32.png

TB1cad8oQcx_u4jSZFlXXXnUFXa-32-32.png

418 ms

log

log

133 ms

get

get

8 ms

v1.7-5097

v1.7-5097

8 ms

cookiepref.png

cookiepref.png

15 ms

resolve

resolve

28 ms

TB1WL6kRkY2gK0jSZFgXXc5OFXa-32-32.png

TB1WL6kRkY2gK0jSZFgXXc5OFXa-32-32.png

25 ms

O1CN011GngGP1qOdo54ADqK_!!6000000005486-1-tps-192-192.gif

O1CN011GngGP1qOdo54ADqK_!!6000000005486-1-tps-192-192.gif

53 ms

O1CN01wiNwpz1a0nKcNvMKv_!!6000000003268-1-tps-192-192.gif

O1CN01wiNwpz1a0nKcNvMKv_!!6000000003268-1-tps-192-192.gif

77 ms

v.gif

v.gif

233 ms

seal

seal

20 ms

seal

seal

24 ms

track_ua.gif

track_ua.gif

358 ms

easemob.js

easemob.js

2300 ms

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30 ms

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25 ms

clear.png

clear.png

936 ms

um.json

um.json

510 ms

bl.js

bl.js

735 ms

client

client

75 ms

index.js

index.js

9 ms

changeChoice

changeChoice

95 ms

baxiaCommon.js

baxiaCommon.js

12 ms

rp

rp

974 ms

bannermsg

bannermsg

75 ms

get

get

6 ms

Accessibility Review

developer.alibabacloud.com accessibility score

80

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

developer.alibabacloud.com best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

developer.alibabacloud.com SEO score

76

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

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Developer.alibabacloud.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Developer.alibabacloud.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.

Social Sharing Optimization

developer.alibabacloud.com

Open Graph data is detected on the main page of Developer Alibaba Cloud. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: