Tools & Wizards About Us
oef.org.cn screenshot

Report Summary

  • 3

    Performance

    Renders faster than
    20% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

oef.org.cn

开放教育反应堆 Open Education Fusion | （筹）开放教育基金会 Open Education Foundation

Page Load Speed

9.5 sec in total

First Response

1.9 sec

Resources Loaded

6.9 sec

Page Rendered

663 ms

oef.org.cn screenshot

About Website

Welcome to oef.org.cn homepage info - get ready to check Oef best content for Singapore right away, or after learning these important things about oef.org.cn

开放教育反应堆（筹备 开放教育基金会 Open Education Foundation）是一个以推进开放教育为目标的非盈利组织，旨在推动教育进步、教育信息化和开源教育。目前：教师联盟、PhET简体中文社区、开放教材、捐赠 ezgo 电脑公益项目、公益学校志工教师等。

Visit oef.org.cn

Key Findings

We analyzed Oef.org.cn page load time and found that the first response time was 1.9 sec and then it took 7.6 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

oef.org.cn performance score

3

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value11.2 s

0/100

25%

SI (Speed Index)

Value19.0 s

0/100

10%

TBT (Total Blocking Time)

Value12,640 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.807

5/100

15%

TTI (Time to Interactive)

Value21.1 s

1/100

10%

Network Requests Diagram

oef.org.cn

1910 ms

css

1946 ms

css

29 ms

c7cd7d11b1eb3a453fc4cd1fe884e612.js

445 ms

oef-logo-2017-1.png

385 ms

Our browser made a total of 32 requests to load all elements on the main page. We found that 81% of them (26 requests) were addressed to the original Oef.org.cn, 13% (4 requests) were made to Fonts.gstatic.com and 3% (1 request) were made to Googlefonts.wp-china-yes.net. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Googlefonts.wp-china-yes.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 211.7 kB (35%)

Content Size

609.3 kB

After Optimization

397.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Oef.org.cn main page is 609.3 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. Images take 258.6 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 163.2 kB

  • Original 193.9 kB
  • After minification 192.2 kB
  • After compression 30.7 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 163.2 kB or 84% of the original size.

Image Optimization

-7%

Potential reduce by 17.0 kB

  • Original 258.6 kB
  • After minification 241.7 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. Oef images are well optimized though.

JavaScript Optimization

-12%

Potential reduce by 646 B

  • Original 5.6 kB
  • After minification 5.6 kB
  • After compression 5.0 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 646 B or 12% of the original size.

CSS Optimization

-20%

Potential reduce by 30.9 kB

  • Original 151.1 kB
  • After minification 151.1 kB
  • After compression 120.2 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. Oef.org.cn needs all CSS files to be minified and compressed as it can save up to 30.9 kB or 20% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (58%)

Requests Now

24

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Oef. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

oef.org.cn

oef.org.cn

1910 ms

css

css

1946 ms

css

css

29 ms

c7cd7d11b1eb3a453fc4cd1fe884e612.js

c7cd7d11b1eb3a453fc4cd1fe884e612.js

445 ms

oef-logo-2017-1.png

oef-logo-2017-1.png

385 ms

woman-in-red-long-sleeve-writing-on-chalk-board-3769714-10x6.jpg

woman-in-red-long-sleeve-writing-on-chalk-board-3769714-10x6.jpg

252 ms

girl-book-10x6.jpg

girl-book-10x6.jpg

254 ms

physics-e1492066011738.jpg

physics-e1492066011738.jpg

316 ms

house-10x8.jpg

house-10x8.jpg

300 ms

2021gewuscholarship-award-ceremony-10x6.png

2021gewuscholarship-award-ceremony-10x6.png

478 ms

cover-for-the-eighth-gewu-scholarship-10x7.jpg

cover-for-the-eighth-gewu-scholarship-10x7.jpg

569 ms

acer-club-logo1-10x3.png

acer-club-logo1-10x3.png

545 ms

china-lug-10x3.png

china-lug-10x3.png

543 ms

ezgochina_logo4-10x3.png

ezgochina_logo4-10x3.png

612 ms

linux-story-logo-regular-10x3.png

linux-story-logo-regular-10x3.png

687 ms

wiseteacher-logo-10x3.png

wiseteacher-logo-10x3.png

716 ms

swu-logo-10x3.png

swu-logo-10x3.png

777 ms

openingsource-10x4.png

openingsource-10x4.png

787 ms

oef-wechat-300.jpg

oef-wechat-300.jpg

940 ms

rss.png

rss.png

854 ms

7b132583332ff7504546b9ac0c8fff97.css

7b132583332ff7504546b9ac0c8fff97.css

448 ms

6724b05045f482bf19b622655079b80f.css

6724b05045f482bf19b622655079b80f.css

283 ms

sun-sea.jpeg

sun-sea.jpeg

419 ms

sea.jpg

sea.jpg

547 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

249 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVQ.woff

26 ms

pxiEyp8kv8JHgFVrJJfedA.woff

pxiEyp8kv8JHgFVrJJfedA.woff

47 ms

pxiByp8kv8JHgFVrLDz8Z1xlEw.woff

pxiByp8kv8JHgFVrLDz8Z1xlEw.woff

162 ms

linea.woff

linea.woff

304 ms

ionicons.ttf

ionicons.ttf

497 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

467 ms

nuFRD-vYSZviVYUb_rj3ij__anPXDTnCjmHKM4nYO7KN_gGUXtHA_w.woff

nuFRD-vYSZviVYUb_rj3ij__anPXDTnCjmHKM4nYO7KN_gGUXtHA_w.woff

163 ms

Accessibility Review

oef.org.cn accessibility score

68

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

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

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

oef.org.cn 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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

oef.org.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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    ZH

  • Encoding

    UTF-8

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

oef.org.cn

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