Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 43% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

nidss.cdc.gov.tw

傳染病統計資料查詢系統

Page Load Speed

5.7 sec in total

First Response

662 ms

Resources Loaded

4.9 sec

Page Rendered

158 ms

nidss.cdc.gov.tw screenshot

About Website

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Key Findings

We analyzed Nidss.cdc.gov.tw page load time and found that the first response time was 662 ms and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster. This domain responded with an error, which can significantly jeopardize Nidss.cdc.gov.tw rating and web reputation

Performance Metrics

nidss.cdc.gov.tw performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.3 s

1/100

25%

SI (Speed Index)

Value15.9 s

0/100

10%

TBT (Total Blocking Time)

Value1,660 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.112

87/100

15%

TTI (Time to Interactive)

Value17.5 s

4/100

10%

Network Requests Diagram

nidss.cdc.gov.tw

662 ms

2044 ms

base.css

622 ms

page.css

652 ms

bootstrap.min.css

1741 ms

Our browser made a total of 32 requests to load all elements on the main page. We found that 75% of them (24 requests) were addressed to the original Nidss.cdc.gov.tw, 9% (3 requests) were made to Code.jquery.com and 6% (2 requests) were made to Maxcdn.bootstrapcdn.com. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Nidss.cdc.gov.tw.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.6 MB (76%)

Content Size

2.1 MB

After Optimization

506.2 kB

In fact, the total size of Nidss.cdc.gov.tw main page is 2.1 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. Javascripts take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 541.7 kB

  • Original 618.9 kB
  • After minification 609.9 kB
  • After compression 77.2 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 541.7 kB or 88% of the original size.

Image Optimization

-25%

Potential reduce by 52.3 kB

  • Original 211.6 kB
  • After minification 159.3 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, Nidss Cdc needs image optimization as it can save up to 52.3 kB or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-77%

Potential reduce by 791.7 kB

  • Original 1.0 MB
  • After minification 712.2 kB
  • After compression 238.7 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 791.7 kB or 77% of the original size.

CSS Optimization

-86%

Potential reduce by 186.9 kB

  • Original 217.8 kB
  • After minification 173.6 kB
  • After compression 30.9 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. Nidss.cdc.gov.tw needs all CSS files to be minified and compressed as it can save up to 186.9 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (54%)

Requests Now

26

After Optimization

12

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Nidss Cdc. 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 from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

nidss.cdc.gov.tw accessibility score

76

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

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.

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

nidss.cdc.gov.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

nidss.cdc.gov.tw SEO score

67

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 doesn't use legible font sizes

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 Nidss.cdc.gov.tw 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 Nidss.cdc.gov.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

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