6.7 sec in total
617 ms
5.1 sec
998 ms
Visit douclass.com now to see the best up-to-date Douclass content for South Korea and also check out these interesting facts you probably never knew about douclass.com
동아출판 교과서와 교실 수업을 위한 모든 자료, 문제은행과 다양한 영상 콘텐츠를 제공합니다!
Visit douclass.comWe analyzed Douclass.com page load time and found that the first response time was 617 ms and then it took 6.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
douclass.com performance score
name
value
score
weighting
Value17.7 s
0/100
10%
Value37.4 s
0/100
25%
Value26.6 s
0/100
10%
Value1,270 ms
19/100
30%
Value0.001
100/100
15%
Value31.7 s
0/100
10%
617 ms
531 ms
1001 ms
1036 ms
718 ms
Our browser made a total of 31 requests to load all elements on the main page. We found that 6% of them (2 requests) were addressed to the original Douclass.com, 84% (26 requests) were made to Ele.douclass.com and 6% (2 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (2.2 sec) relates to the external source Ele.douclass.com.
Page size can be reduced by 886.9 kB (73%)
1.2 MB
325.1 kB
In fact, the total size of Douclass.com main page is 1.2 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. 60% of websites need less resources to load. Javascripts take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 37.3 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 37.3 kB or 82% of the original size.
Potential reduce by 849.6 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 849.6 kB or 73% of the original size.
Number of requests can be reduced by 12 (63%)
19
7
The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Douclass. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for CSS and as a result speed up the page load time.
douclass.com
617 ms
gate.donga
531 ms
ele.douclass.com
1001 ms
entry.249d7096.css
1036 ms
swiper-vue.25ac1039.css
718 ms
default.b05575e4.css
533 ms
icon-profile.1ab6f318.css
530 ms
index.20482a3f.css
534 ms
index.061b2d5b.css
535 ms
main_special05.svg
1162 ms
entry.62549f96.js
2229 ms
logo.1e6a9ceb.svg
988 ms
alert-folders.9603b168.svg
799 ms
logo-footer.ac2be145.svg
710 ms
css2
152 ms
css2
170 ms
icon-search-white.435fa59a.svg
356 ms
icon-menu-dark.6e9224b9.svg
358 ms
icon-ssam-blue.69b97659.svg
381 ms
icon-map.302d77e2.svg
354 ms
icon-arr-up-green.c7a3ef98.svg
358 ms
icon-menu2-dark.00631f8d.svg
381 ms
Pretendard-Regular.subset.5b986dca.woff
178 ms
Pretendard-Medium.subset.63da031f.woff
886 ms
Pretendard-Light.subset.b8b86e21.woff
1083 ms
Pretendard-ExtraLight.subset.79de00b7.woff
1030 ms
Pretendard-Thin.subset.bef33fee.woff
908 ms
Pretendard-SemiBold.subset.44ec3408.woff
348 ms
Pretendard-Bold.subset.28c66d5a.woff
526 ms
Pretendard-ExtraBold.subset.642034b8.woff
699 ms
Pretendard-Black.subset.63bb1084.woff
715 ms
douclass.com accessibility score
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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Form elements do not have associated labels
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
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
<html> element does not have a [lang] attribute
douclass.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
douclass.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Page is blocked from indexing
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
KO
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Douclass.com can be misinterpreted by Google and other search engines. Our service has detected that Korean 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 Douclass.com 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.
douclass.com
Open Graph data is detected on the main page of Douclass. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: