Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

coretek.com.tw

Coretek Opto Corporation | Coretek Opto Corporation

Page Load Speed

7.1 sec in total

First Response

1.3 sec

Resources Loaded

5.7 sec

Page Rendered

105 ms

coretek.com.tw screenshot

About Website

Welcome to coretek.com.tw homepage info - get ready to check Coretek best content right away, or after learning these important things about coretek.com.tw

Coretek is a leading provider of optical communication products used in telecommunication systems, data communication and fiber channel storage applications. We design, manufacture, and sell a broad b...

Visit coretek.com.tw

Key Findings

We analyzed Coretek.com.tw page load time and found that the first response time was 1.3 sec and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

coretek.com.tw performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value12.8 s

0/100

25%

SI (Speed Index)

Value17.1 s

0/100

10%

TBT (Total Blocking Time)

Value570 ms

52/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.6 s

14/100

10%

Network Requests Diagram

coretek.com.tw

1348 ms

css

41 ms

js

71 ms

jquery-1.12.4.min.js

1041 ms

jquery-migrate-1.4.1.js

849 ms

Our browser made a total of 61 requests to load all elements on the main page. We found that 5% of them (3 requests) were addressed to the original Coretek.com.tw, 70% (43 requests) were made to System21.webtech.com.tw and 11% (7 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (2.1 sec) relates to the external source System21.webtech.com.tw.

Page Optimization Overview & Recommendations

Page size can be reduced by 76.2 kB (20%)

Content Size

384.9 kB

After Optimization

308.7 kB

In fact, the total size of Coretek.com.tw main page is 384.9 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. 45% of websites need less resources to load. Javascripts take 229.7 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 42.2 kB

  • Original 54.8 kB
  • After minification 50.1 kB
  • After compression 12.6 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 42.2 kB or 77% of the original size.

Image Optimization

-14%

Potential reduce by 5.3 kB

  • Original 38.2 kB
  • After minification 32.8 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, Coretek needs image optimization as it can save up to 5.3 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-12%

Potential reduce by 27.7 kB

  • Original 229.7 kB
  • After minification 229.7 kB
  • After compression 202.1 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 27.7 kB or 12% of the original size.

CSS Optimization

-2%

Potential reduce by 972 B

  • Original 62.2 kB
  • After minification 62.2 kB
  • After compression 61.2 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. Coretek.com.tw has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 49 (94%)

Requests Now

52

After Optimization

3

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coretek. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and from 23 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

coretek.com.tw accessibility score

87

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.

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>).

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

coretek.com.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

SEO Factors

coretek.com.tw SEO score

100

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

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 Coretek.com.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 Coretek.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

Open Graph data is detected on the main page of Coretek. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: