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jollen.org screenshot

Report Summary

  • 85

    Performance

    Renders faster than
    88% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

jollen.org

Jollen 網路學院 2020 :: Embedded Linux Consulting and Training :: 嵌入式 Linux 顧問與教育訓練

Page Load Speed

2 sec in total

First Response

374 ms

Resources Loaded

1.5 sec

Page Rendered

145 ms

jollen.org screenshot

About Website

Click here to check amazing Jollen content for Taiwan. Otherwise, check out these important facts you probably never knew about jollen.org

Jollen's blog, training materials and consultancy for Embedded Linux, Linux device drivers, Linux kernel and embedded systems.

Visit jollen.org

Key Findings

We analyzed Jollen.org page load time and found that the first response time was 374 ms and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

jollen.org performance score

85

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

90/100

10%

LCP (Largest Contentful Paint)

Value2.4 s

91/100

25%

SI (Speed Index)

Value3.6 s

87/100

10%

TBT (Total Blocking Time)

Value290 ms

80/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value7.0 s

53/100

10%

Network Requests Diagram

jollen.org

374 ms

www.jollen.org

536 ms

layout.css

64 ms

this_is_jollen.gif

183 ms

all.js

19 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 30% of them (7 requests) were addressed to the original Jollen.org, 26% (6 requests) were made to Apis.google.com and 9% (2 requests) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (536 ms) belongs to the original domain Jollen.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 26.1 kB (12%)

Content Size

225.0 kB

After Optimization

198.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jollen.org main page is 225.0 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. Javascripts take 166.6 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 19.3 kB

  • Original 26.6 kB
  • After minification 23.5 kB
  • After compression 7.3 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. This page needs HTML code to be minified as it can gain 3.1 kB, which is 12% 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 19.3 kB or 72% of the original size.

Image Optimization

-11%

Potential reduce by 2.9 kB

  • Original 27.3 kB
  • After minification 24.4 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, Jollen needs image optimization as it can save up to 2.9 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 502 B

  • Original 166.6 kB
  • After minification 166.6 kB
  • After compression 166.1 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

-75%

Potential reduce by 3.4 kB

  • Original 4.5 kB
  • After minification 4.3 kB
  • After compression 1.1 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. Jollen.org needs all CSS files to be minified and compressed as it can save up to 3.4 kB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (47%)

Requests Now

19

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jollen. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

jollen.org

jollen.org

374 ms

www.jollen.org

www.jollen.org

536 ms

layout.css

layout.css

64 ms

this_is_jollen.gif

this_is_jollen.gif

183 ms

all.js

all.js

19 ms

plusone.js

plusone.js

23 ms

P732_cover_s.jpg

P732_cover_s.jpg

187 ms

P736_cover_s.jpg

P736_cover_s.jpg

249 ms

RSS_Feed_icon.png

RSS_Feed_icon.png

250 ms

all.js

all.js

10 ms

ga.js

ga.js

36 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

26 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

58 ms

fastbutton

fastbutton

53 ms

__utm.gif

__utm.gif

48 ms

like.php

like.php

230 ms

postmessageRelay

postmessageRelay

70 ms

developers.google.com

developers.google.com

298 ms

3604799710-postmessagerelay.js

3604799710-postmessagerelay.js

20 ms

rpc:shindig_random.js

rpc:shindig_random.js

6 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

6 ms

fy_wU0FBvkG.js

fy_wU0FBvkG.js

25 ms

FEppCFCt76d.png

FEppCFCt76d.png

18 ms

Accessibility Review

jollen.org accessibility score

69

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

<frame> or <iframe> elements do not have a title

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

Best Practices

jollen.org best practices score

58

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

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

jollen.org SEO score

69

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

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 Jollen.org 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 Jollen.org 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

jollen.org

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