Tools & Wizards About Us
oef.org.cn screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 78

    SEO

    Google-friendlier than
    39% 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

6.5 sec in total

First Response

412 ms

Resources Loaded

5.3 sec

Page Rendered

750 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 412 ms and then it took 6.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

oef.org.cn performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

17/100

10%

LCP (Largest Contentful Paint)

Value9.5 s

0/100

25%

SI (Speed Index)

Value8.8 s

16/100

10%

TBT (Total Blocking Time)

Value780 ms

38/100

30%

CLS (Cumulative Layout Shift)

Value0.807

5/100

15%

TTI (Time to Interactive)

Value9.3 s

32/100

10%

Network Requests Diagram

oef.org.cn

412 ms

oef.org.cn

1116 ms

css

31 ms

87fe71659688ef270cd0f0a19a6f759f.js

628 ms

Nx56xoef-logo-2017-1.png.pagespeed.ic._rKNI7fHvK.png

578 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 69% of them (27 requests) were addressed to the original Oef.org.cn, 28% (11 requests) were made to Fonts.gstatic.com and 3% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Oef.org.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (65%)

Content Size

1.7 MB

After Optimization

596.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Oef.org.cn main page is 1.7 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. 30% of websites need less resources to load. CSS take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 163.3 kB

  • Original 195.7 kB
  • After minification 195.4 kB
  • After compression 32.4 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 163.3 kB or 83% of the original size.

Image Optimization

-0%

Potential reduce by 261 B

  • Original 322.1 kB
  • After minification 321.9 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. Oef images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 119.6 kB
  • After minification 119.6 kB
  • After compression 119.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-88%

Potential reduce by 933.7 kB

  • Original 1.1 MB
  • After minification 1.0 MB
  • After compression 122.6 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 933.7 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (52%)

Requests Now

23

After Optimization

11

  • Images
  • JavaScript
  • CSS

The browser has sent 23 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 and as a result speed up the page load time.

Network Requests Diagram

oef.org.cn

oef.org.cn

412 ms

oef.org.cn

oef.org.cn

1116 ms

css

css

31 ms

87fe71659688ef270cd0f0a19a6f759f.js

87fe71659688ef270cd0f0a19a6f759f.js

628 ms

Nx56xoef-logo-2017-1.png.pagespeed.ic._rKNI7fHvK.png

Nx56xoef-logo-2017-1.png.pagespeed.ic._rKNI7fHvK.png

578 ms

xoef-logo-2017-1.png.pagespeed.ic.LY3o4xHanJ.png

xoef-logo-2017-1.png.pagespeed.ic.LY3o4xHanJ.png

968 ms

xwoman-in-red-long-sleeve-writing-on-chalk-board-3769714-10x6.jpg.pagespeed.ic.kRk-5NaBYy.jpg

xwoman-in-red-long-sleeve-writing-on-chalk-board-3769714-10x6.jpg.pagespeed.ic.kRk-5NaBYy.jpg

605 ms

xgirl-book-10x6.jpg.pagespeed.ic.JycRoo3KGf.jpg

xgirl-book-10x6.jpg.pagespeed.ic.JycRoo3KGf.jpg

619 ms

xphysics-e1492066011738.jpg.pagespeed.ic.et_stCbr21.jpg

xphysics-e1492066011738.jpg.pagespeed.ic.et_stCbr21.jpg

828 ms

xhouse-10x8.jpg.pagespeed.ic.k1rVuRUkmH.jpg

xhouse-10x8.jpg.pagespeed.ic.k1rVuRUkmH.jpg

769 ms

x2021gewuscholarship-award-ceremony-10x6.png.pagespeed.ic.OOTr9mNIye.png

x2021gewuscholarship-award-ceremony-10x6.png.pagespeed.ic.OOTr9mNIye.png

805 ms

xcover-for-the-eighth-gewu-scholarship-10x7.jpg.pagespeed.ic.AvLG1wtrsF.jpg

xcover-for-the-eighth-gewu-scholarship-10x7.jpg.pagespeed.ic.AvLG1wtrsF.jpg

824 ms

xacer-club-logo1-10x3.png.pagespeed.ic.kdUeeLuCTi.png

xacer-club-logo1-10x3.png.pagespeed.ic.kdUeeLuCTi.png

826 ms

xchina-lug-10x3.png.pagespeed.ic.tsyZDW1-3c.png

xchina-lug-10x3.png.pagespeed.ic.tsyZDW1-3c.png

961 ms

ezgochina_logo4-10x3.png

ezgochina_logo4-10x3.png

1007 ms

xlinux-story-logo-regular-10x3.png.pagespeed.ic.R3pPVua_IJ.png

xlinux-story-logo-regular-10x3.png.pagespeed.ic.R3pPVua_IJ.png

1030 ms

xwiseteacher-logo-10x3.png.pagespeed.ic.B-Oj_kQ4Lj.png

xwiseteacher-logo-10x3.png.pagespeed.ic.B-Oj_kQ4Lj.png

1024 ms

xswu-logo-10x3.png.pagespeed.ic.qLVXSPD-hB.png

xswu-logo-10x3.png.pagespeed.ic.qLVXSPD-hB.png

1033 ms

openingsource-10x4.png

openingsource-10x4.png

1153 ms

xoef-wechat-300.jpg.pagespeed.ic.R4hfIWlfHc.jpg

xoef-wechat-300.jpg.pagespeed.ic.R4hfIWlfHc.jpg

1160 ms

rss.png

rss.png

1207 ms

A.9e2f4e985274080220709cf615ea5a7d.css.pagespeed.cf.Y5xggpqqhf.css

A.9e2f4e985274080220709cf615ea5a7d.css.pagespeed.cf.Y5xggpqqhf.css

669 ms

xsun-sea.jpeg.pagespeed.ic.YtXxgO1Xpy.jpg

xsun-sea.jpeg.pagespeed.ic.YtXxgO1Xpy.jpg

237 ms

xsea.jpg.pagespeed.ic.UDm9yF_kuI.jpg

xsea.jpg.pagespeed.ic.UDm9yF_kuI.jpg

826 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVQ.woff

29 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVQ.woff

92 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVQ.woff

174 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVQ.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVQ.woff

172 ms

pxiByp8kv8JHgFVrLCz7Z1xlEw.woff

pxiByp8kv8JHgFVrLCz7Z1xlEw.woff

146 ms

pxiByp8kv8JHgFVrLEj6Z1xlEw.woff

pxiByp8kv8JHgFVrLEj6Z1xlEw.woff

172 ms

pxiByp8kv8JHgFVrLGT9Z1xlEw.woff

pxiByp8kv8JHgFVrLGT9Z1xlEw.woff

172 ms

pxiEyp8kv8JHgFVrJJfedA.woff

pxiEyp8kv8JHgFVrJJfedA.woff

145 ms

pxiByp8kv8JHgFVrLDz8Z1xlEw.woff

pxiByp8kv8JHgFVrLDz8Z1xlEw.woff

173 ms

linea.woff

linea.woff

276 ms

ionicons.ttf

ionicons.ttf

1002 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

619 ms

nuFRD-vYSZviVYUb_rj3ij__anPXDTnCjmHKM4nYO7KN_gGUXtHA_w.woff

nuFRD-vYSZviVYUb_rj3ij__anPXDTnCjmHKM4nYO7KN_gGUXtHA_w.woff

173 ms

nuFvD-vYSZviVYUb_rj3ij__anPXJzDwcbmjWBN2PKdFvXDXbtU.woff

nuFvD-vYSZviVYUb_rj3ij__anPXJzDwcbmjWBN2PKdFvXDXbtU.woff

173 ms

6724b05045f482bf19b622655079b80f.css

6724b05045f482bf19b622655079b80f.css

208 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

75

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

High

Browser errors were logged to the console

SEO Factors

oef.org.cn SEO score

78

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

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: