Tools & Wizards About Us
cs.nctu.edu.tw screenshot

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 72% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

cs.nctu.edu.tw

首頁 - Department of Computer Science, National Yang Ming Chiao Tung University

Page Load Speed

11 sec in total

First Response

1.8 sec

Resources Loaded

9 sec

Page Rendered

200 ms

cs.nctu.edu.tw screenshot

About Website

Click here to check amazing Cs Nctu content for Taiwan. Otherwise, check out these important facts you probably never knew about cs.nctu.edu.tw

隨著電腦研究分工日漸細密，交通大學在民國六十九年於計算機工程系之外另成立資訊科學系，專精電腦科學理論的教學研究，為國內首創。二十年來計算機工程系（後易名為資訊工程系）與資訊科學系各自發展優良的教學研究環境，各擁有堅強的師資、學生陣容，以及廣大傑出之畢業校友，擔任資訊產業的領導人或中堅份子。

Visit cs.nctu.edu.tw

Key Findings

We analyzed Cs.nctu.edu.tw page load time and found that the first response time was 1.8 sec and then it took 9.2 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

cs.nctu.edu.tw performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value17.3 s

0/100

25%

SI (Speed Index)

Value10.0 s

9/100

10%

TBT (Total Blocking Time)

Value720 ms

41/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value11.3 s

19/100

10%

Network Requests Diagram

cs.nctu.edu.tw

1825 ms

cswebsite

1084 ms

681 ms

bootstrap-combined.min.css

1249 ms

main.min.css

423 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 71% of them (32 requests) were addressed to the original Cs.nctu.edu.tw, 11% (5 requests) were made to Google.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (4.3 sec) belongs to the original domain Cs.nctu.edu.tw.

Page Optimization Overview & Recommendations

Page size can be reduced by 294.6 kB (12%)

Content Size

2.5 MB

After Optimization

2.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cs.nctu.edu.tw main page is 2.5 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. 25% of websites need less resources to load. Images take 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 17.4 kB

  • Original 24.1 kB
  • After minification 23.4 kB
  • After compression 6.7 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 17.4 kB or 72% of the original size.

Image Optimization

-2%

Potential reduce by 43.1 kB

  • Original 2.2 MB
  • After minification 2.1 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. Cs Nctu images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 105.7 kB

  • Original 168.5 kB
  • After minification 168.2 kB
  • After compression 62.9 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 105.7 kB or 63% of the original size.

CSS Optimization

-83%

Potential reduce by 128.5 kB

  • Original 154.9 kB
  • After minification 147.7 kB
  • After compression 26.4 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. Cs.nctu.edu.tw needs all CSS files to be minified and compressed as it can save up to 128.5 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (58%)

Requests Now

40

After Optimization

17

  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cs Nctu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

cs.nctu.edu.tw

cs.nctu.edu.tw

1825 ms

cswebsite

cswebsite

1084 ms

681 ms

bootstrap-combined.min.css

bootstrap-combined.min.css

1249 ms

main.min.css

main.min.css

423 ms

eng.css

eng.css

450 ms

jquery.min.js

jquery.min.js

32 ms

bootstrap.min.js

bootstrap.min.js

5 ms

jquery.history.js

jquery.history.js

726 ms

chosen.jquery.min.js

chosen.jquery.min.js

840 ms

plugins.min.js

plugins.min.js

630 ms

scripts.min.js

scripts.min.js

674 ms

piwik.js

piwik.js

1848 ms

fbevents.js

fbevents.js

67 ms

cse.js

cse.js

20 ms

ga.js

ga.js

63 ms

bg-bg_top.jpg

bg-bg_top.jpg

215 ms

bg-top.jpg

bg-top.jpg

1435 ms

pic_logo_en.png

pic_logo_en.png

228 ms

btn_search.jpg

btn_search.jpg

1084 ms

left.png

left.png

230 ms

right.png

right.png

423 ms

hr_pic.jpg

hr_pic.jpg

677 ms

bg-index_m_tbox.gif

bg-index_m_tbox.gif

456 ms

btn_more.png

btn_more.png

879 ms

bg-tab.gif

bg-tab.gif

685 ms

bg_tbox2.gif

bg_tbox2.gif

906 ms

icon_cap.gif

icon_cap.gif

912 ms

1%2520-%2520.jpg

1%2520-%2520.jpg

2172 ms

7%2520-%2520.jpg

7%2520-%2520.jpg

2948 ms

bg-index_r_tbox.gif

bg-index_r_tbox.gif

1139 ms

bg-footer.gif

bg-footer.gif

1291 ms

cse.js

cse.js

248 ms

IMG_2452110.jpg

IMG_2452110.jpg

2540 ms

Snap19085.png

Snap19085.png

1551 ms

IMG_7125001.jpg

IMG_7125001.jpg

2893 ms

159.png

159.png

4261 ms

IMG.jpg

IMG.jpg

1932 ms

__utm.gif

__utm.gif

29 ms

23 ms

jsapi

jsapi

67 ms

default+zh_TW.css

default+zh_TW.css

6 ms

default.css

default.css

21 ms

default+zh_TW.I.js

default+zh_TW.I.js

24 ms

default.css

default.css

20 ms

Accessibility Review

cs.nctu.edu.tw accessibility score

89

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.

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

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

cs.nctu.edu.tw 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

Page has valid source maps

SEO Factors

cs.nctu.edu.tw SEO score

90

Search Engine Optimization Advices

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 Cs.nctu.edu.tw 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 Cs.nctu.edu.tw 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

cs.nctu.edu.tw

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