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csem.com.tw screenshot

Report Summary

  • 97

    Performance

    Renders faster than
    95% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 38

    SEO

    Google-friendlier than
    18% of websites

csem.com.tw

清晰科技股份有限公司

Page Load Speed

13.6 sec in total

First Response

959 ms

Resources Loaded

12.5 sec

Page Rendered

135 ms

csem.com.tw screenshot

About Website

Click here to check amazing Csem content. Otherwise, check out these important facts you probably never knew about csem.com.tw

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Key Findings

We analyzed Csem.com.tw page load time and found that the first response time was 959 ms and then it took 12.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

csem.com.tw performance score

97

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value1.4 s

100/100

25%

SI (Speed Index)

Value4.2 s

78/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.052

99/100

15%

TTI (Time to Interactive)

Value1.4 s

100/100

10%

Network Requests Diagram

csem.com.tw

959 ms

AC_RunActiveContent.js

489 ms

SpryMenuBar.js

690 ms

SpryTabbedPanels.js

759 ms

SpryTabbedPanels.css

600 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 70% of them (14 requests) were addressed to the original Csem.com.tw, 30% (6 requests) were made to Seo-lab.net. The less responsive or slowest element that took the longest time to load (11 sec) belongs to the original domain Csem.com.tw.

Page Optimization Overview & Recommendations

Page size can be reduced by 96.3 kB (31%)

Content Size

312.8 kB

After Optimization

216.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Csem.com.tw main page is 312.8 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 257.9 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 9.2 kB

  • Original 13.2 kB
  • After minification 11.5 kB
  • After compression 4.0 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 1.6 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 9.2 kB or 70% of the original size.

Image Optimization

-20%

Potential reduce by 51.2 kB

  • Original 257.9 kB
  • After minification 206.7 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. Obviously, Csem needs image optimization as it can save up to 51.2 kB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-83%

Potential reduce by 23.5 kB

  • Original 28.3 kB
  • After minification 17.5 kB
  • After compression 4.8 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 23.5 kB or 83% of the original size.

CSS Optimization

-93%

Potential reduce by 12.4 kB

  • Original 13.3 kB
  • After minification 3.1 kB
  • After compression 934 B

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. Csem.com.tw needs all CSS files to be minified and compressed as it can save up to 12.4 kB or 93% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (37%)

Requests Now

19

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Csem. 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

csem.com.tw

csem.com.tw

959 ms

AC_RunActiveContent.js

AC_RunActiveContent.js

489 ms

SpryMenuBar.js

SpryMenuBar.js

690 ms

SpryTabbedPanels.js

SpryTabbedPanels.js

759 ms

SpryTabbedPanels.css

SpryTabbedPanels.css

600 ms

SpryMenuBarHorizontal.css

SpryMenuBarHorizontal.css

537 ms

clr_counter.js

clr_counter.js

681 ms

sky.jpg

sky.jpg

1439 ms

left.gif

left.gif

11048 ms

right.png

right.png

614 ms

ISO.png

ISO.png

743 ms

SpryMenuBarDown.gif

SpryMenuBarDown.gif

444 ms

skyyy.jpg

skyyy.jpg

2036 ms

mdn_w5_0.png

mdn_w5_0.png

312 ms

mdn_w5_1.png

mdn_w5_1.png

318 ms

mdn_w5_4.png

mdn_w5_4.png

318 ms

mdn_w5_9.png

mdn_w5_9.png

355 ms

mdn_w5_2.png

mdn_w5_2.png

358 ms

SpryMenuBarDownHover.gif

SpryMenuBarDownHover.gif

642 ms

SpryMenuBarRightHover.gif

SpryMenuBarRightHover.gif

858 ms

Accessibility Review

csem.com.tw accessibility score

68

Accessibility Issues

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

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

Best Practices

csem.com.tw 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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

csem.com.tw SEO score

38

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

High

Image elements do not have [alt] attributes

High

Document uses plugins

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Csem.com.tw can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Csem.com.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

csem.com.tw

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