11.6 sec in total
700 ms
10.8 sec
122 ms
Click here to check amazing NDSL content for South Korea. Otherwise, check out these important facts you probably never knew about ndsl.kr
Visit ndsl.krWe analyzed Ndsl.kr page load time and found that the first response time was 700 ms and then it took 10.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
ndsl.kr performance score
name
value
score
weighting
Value18.8 s
0/100
10%
Value36.7 s
0/100
25%
Value25.7 s
0/100
10%
Value2,070 ms
7/100
30%
Value0.209
59/100
15%
Value39.1 s
0/100
10%
700 ms
915 ms
2049 ms
616 ms
470 ms
Our browser made a total of 168 requests to load all elements on the main page. We found that 95% of them (159 requests) were addressed to the original Ndsl.kr, 2% (3 requests) were made to Fonts.gstatic.com and 1% (2 requests) were made to Cdn.mathjax.org. The less responsive or slowest element that took the longest time to load (2.5 sec) belongs to the original domain Ndsl.kr.
Page size can be reduced by 1.1 MB (67%)
1.6 MB
525.4 kB
In fact, the total size of Ndsl.kr main page is 1.6 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. 65% of websites need less resources to load. Javascripts take 832.1 kB which makes up the majority of the site volume.
Potential reduce by 99.8 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 99.8 kB or 82% of the original size.
Potential reduce by 23.9 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. NDSL images are well optimized though.
Potential reduce by 617.5 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 617.5 kB or 74% of the original size.
Potential reduce by 333.0 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. Ndsl.kr needs all CSS files to be minified and compressed as it can save up to 333.0 kB or 81% of the original size.
Number of requests can be reduced by 73 (45%)
162
89
The browser has sent 162 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NDSL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 33 to 1 for CSS and as a result speed up the page load time.
ndsl.kr
700 ms
www.ndsl.kr
915 ms
index.do
2049 ms
MathJax.js
616 ms
main_reset.css
470 ms
all_main.css
926 ms
jquery.min.js
1602 ms
jquery-ui.min.js
2501 ms
issue2.js
479 ms
ui.all.css
229 ms
neo_common.css
233 ms
login.css
453 ms
wiseark.css
460 ms
TeX-AMS-MML_HTMLorMML.js
16 ms
nanumgothic.css
53 ms
issue.js
470 ms
common_util.js
1393 ms
common_string.js
953 ms
prototype.js
1147 ms
effects.js
1119 ms
window.js
1593 ms
debug.js
1183 ms
ark.js
1347 ms
main_header.css
1132 ms
jquery.bxSlider.js
683 ms
validationUtil.js
706 ms
changePw.js
720 ms
thum_FILE_FGBGDFAEEIGCIEE.png
1830 ms
bg_top.gif
231 ms
txt_favorite.gif
226 ms
pop_scholarx.gif
228 ms
ico_tip.gif
225 ms
logo.gif
458 ms
ark_open.gif
231 ms
ico_detail_open.gif
449 ms
bul00.png
449 ms
01.png
453 ms
02.png
454 ms
03.png
452 ms
04.png
673 ms
05.png
674 ms
06.png
677 ms
07.png
677 ms
08.png
678 ms
09.png
919 ms
10.png
899 ms
help_btn.png
902 ms
main_more_btn.gif
903 ms
ICON-02.jpg
905 ms
link_mobile.gif
906 ms
link_lab.gif
1125 ms
link_twitter.gif
1131 ms
link_facebook.gif
1133 ms
customer_center.gif
1134 ms
tit_family_site.gif
1136 ms
family_group01.png
1147 ms
family_group02.png
1350 ms
family_group03.png
1355 ms
family_group04.png
1356 ms
btn_arrow_left.gif
1358 ms
btn_arrow_right.gif
1360 ms
tit_related_site.gif
1375 ms
goanlink_group01.png
1574 ms
ui.base.css
1578 ms
ui.theme.css
1364 ms
ui.datepicker.css
1365 ms
basic.css
1368 ms
layout.css
1383 ms
setup-sf1.css
1798 ms
setup02.css
1587 ms
setup03.css
1591 ms
setup04.css
1592 ms
setup05.css
1371 ms
setup06.css
1622 ms
asti.css
1598 ms
ndsl.css
1804 ms
myndsl.css
1811 ms
main.css
1812 ms
goanlink_group02.png
1592 ms
goanlink_group03.png
1599 ms
goanlink_group04.png
1407 ms
goanlink_group05.png
1591 ms
ftab01on.gif
1600 ms
ftab02.gif
1628 ms
flinkimg01.gif
1794 ms
flinkimg02.png
1792 ms
flinkimg03.png
1588 ms
flinkimg04.gif
1586 ms
flinkimg05.gif
1595 ms
flinkimg06.gif
1624 ms
flinkimg15.gif
1786 ms
flinkimg07.gif
1785 ms
flinkimg17.png
1584 ms
flinkimg08.gif
1585 ms
flinkimg09.gif
1595 ms
flinkimg10.gif
1628 ms
flinkimg11.png
1788 ms
flinkimg12.png
1783 ms
flinkimg13.png
1586 ms
ui.core.css
1585 ms
ui.resizable.css
1594 ms
ui.accordion.css
1627 ms
jquery.ui.dialog.css
1781 ms
ui.slider.css
1777 ms
ui.tabs.css
1566 ms
ui.progressbar.css
1364 ms
flinkimg14.gif
1376 ms
flinkimg16.gif
1405 ms
flinkimg18.png
1550 ms
f_xbtn.gif
1563 ms
ftab01.gif
1537 ms
ftab02on.gif
1353 ms
relalinkimg01.png
1363 ms
relalinkimg02.gif
1371 ms
relalinkimg03.gif
1351 ms
myndsl02.css
1583 ms
myndsl03.css
1353 ms
myndsl04.css
1354 ms
relalinkimg04.gif
1365 ms
relalinkimg05.gif
1373 ms
relalinkimg06.png
1358 ms
relalinkimg07.gif
1391 ms
relalinkimg08.png
1388 ms
relalinkimg09.gif
1385 ms
relalinkimg20.png
1420 ms
relalinkimg10.gif
1522 ms
relalinkimg11.gif
1371 ms
relalinkimg12.png
1362 ms
relalinkimg13.gif
1362 ms
relalinkimg14.gif
1377 ms
relalinkimg15.gif
1407 ms
relalinkimg16.gif
1516 ms
relalinkimg17.gif
1367 ms
relalinkimg18.gif
1360 ms
img_footer_logo.gif
1360 ms
f_menu1.gif
1376 ms
f_menu2.gif
1409 ms
f_menu3.gif
1512 ms
f_menu4.gif
1368 ms
f_menu5.gif
1359 ms
address.gif
1359 ms
copyright.gif
1375 ms
roundel_trans_new.gif
1408 ms
mark02.gif
1508 ms
mark03.gif
1368 ms
DQCM.gif
1357 ms
loading_txt1.gif
1358 ms
btn_logo.png
1376 ms
pop_scholar02.gif
950 ms
bg_selwrap2.gif
1056 ms
btn_search.gif
1072 ms
tap_bg.png
1075 ms
main_item_11.png
1078 ms
notice_bullet.gif
1101 ms
dot.gif
1184 ms
notice_new_bullet.gif
1283 ms
NanumGothic-Regular.woff
106 ms
NanumGothic-Bold.woff
140 ms
NanumGothic-ExtraBold.woff
216 ms
main_icon_01.gif
1272 ms
main_icon_02.gif
1274 ms
main_icon_03.gif
1277 ms
main_icon_04.gif
1302 ms
bstrk.js
1096 ms
logger.v4.js
230 ms
bg_bottomarea.gif
252 ms
bul_bar.gif
375 ms
ui-bg_flat_75_ffffff_40x100.png
339 ms
ndsl.kr accessibility score
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
[id] attributes on active, focusable elements are not unique
Heading elements are not in a sequentially-descending order
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
Image elements do not have [alt] attributes
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
ndsl.kr best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
ndsl.kr SEO score
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
N/A
KO
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ndsl.kr can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Korean. Our system also found out that Ndsl.kr 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.
ndsl.kr
Open Graph description is not detected on the main page of NDSL. 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: