Tools & Wizards About Us

Report Summary

  • 1

    Performance

    Renders faster than
    19% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 78

    SEO

    Google-friendlier than
    39% of websites

duo.co.kr

듀오 한국대표 결혼정보회사 1577-8333

Page Load Speed

16.3 sec in total

First Response

2.6 sec

Resources Loaded

12.7 sec

Page Rendered

991 ms

About Website

Visit duo.co.kr now to see the best up-to-date Duo content for South Korea and also check out these interesting facts you probably never knew about duo.co.kr

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Visit duo.co.kr

Key Findings

We analyzed Duo.co.kr page load time and found that the first response time was 2.6 sec and then it took 13.7 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

duo.co.kr performance score

1

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value17.4 s

0/100

25%

SI (Speed Index)

Value18.0 s

0/100

10%

TBT (Total Blocking Time)

Value3,870 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value1.001

2/100

15%

TTI (Time to Interactive)

Value35.2 s

0/100

10%

Network Requests Diagram

www.duo.co.kr

2634 ms

jquery-1.12.4.js

659 ms

fullpage.js

1046 ms

swiper.js

1099 ms

inc_header.js

883 ms

Our browser made a total of 303 requests to load all elements on the main page. We found that 49% of them (148 requests) were addressed to the original Duo.co.kr, 30% (90 requests) were made to Common.duo.co.kr and 4% (11 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (4 sec) relates to the external source Common.duo.co.kr.

Page Optimization Overview & Recommendations

Page size can be reduced by 247.6 kB (4%)

Content Size

5.7 MB

After Optimization

5.4 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Duo.co.kr main page is 5.7 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. Only a small number of websites need less resources to load. Images take 5.2 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 99.5 kB

  • Original 117.7 kB
  • After minification 77.1 kB
  • After compression 18.2 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. This page needs HTML code to be minified as it can gain 40.6 kB, which is 35% 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 99.5 kB or 85% of the original size.

Image Optimization

-2%

Potential reduce by 108.4 kB

  • Original 5.2 MB
  • After minification 5.1 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. Duo images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 39.8 kB

  • Original 381.2 kB
  • After minification 381.2 kB
  • After compression 341.5 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.

Requests Breakdown

Number of requests can be reduced by 60 (21%)

Requests Now

283

After Optimization

223

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 283 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Duo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 33 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

duo.co.kr accessibility score

68

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

High

Form elements do not have associated labels

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

duo.co.kr best practices score

58

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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

duo.co.kr SEO score

78

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

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

    KO

  • Language Claimed

    KO

  • Encoding

    EUC-KR

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Duo.co.kr can be misinterpreted by Google and other search engines. Our service has detected that Korean is used on the page, and it matches the claimed language. Our system also found out that Duo.co.kr main page’s claimed encoding is euc-kr. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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