3.2 sec in total
611 ms
2.4 sec
226 ms
Welcome to dammaps.jp homepage info - get ready to check Dam Maps best content for Japan right away, or after learning these important things about dammaps.jp
一般財団法人 日本ダム協会が運営するダム便覧のデータに基づき、地図によるダム情報を提供するサイトです。
Visit dammaps.jpWe analyzed Dammaps.jp page load time and found that the first response time was 611 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
dammaps.jp performance score
name
value
score
weighting
Value5.6 s
6/100
10%
Value11.6 s
0/100
25%
Value10.9 s
6/100
10%
Value610 ms
49/100
30%
Value0.002
100/100
15%
Value13.3 s
12/100
10%
611 ms
37 ms
33 ms
73 ms
105 ms
Our browser made a total of 78 requests to load all elements on the main page. We found that 9% of them (7 requests) were addressed to the original Dammaps.jp, 63% (49 requests) were made to Maps.googleapis.com and 10% (8 requests) were made to Maps.gstatic.com. The less responsive or slowest element that took the longest time to load (611 ms) belongs to the original domain Dammaps.jp.
Page size can be reduced by 490.7 kB (33%)
1.5 MB
1.0 MB
In fact, the total size of Dammaps.jp main page is 1.5 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. 55% of websites need less resources to load. Images take 843.2 kB which makes up the majority of the site volume.
Potential reduce by 64.0 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. 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 64.0 kB or 88% of the original size.
Potential reduce by 18.2 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. Dam Maps images are well optimized though.
Potential reduce by 404.8 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 404.8 kB or 69% of the original size.
Potential reduce by 3.7 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. Dammaps.jp needs all CSS files to be minified and compressed as it can save up to 3.7 kB or 72% of the original size.
Number of requests can be reduced by 25 (34%)
73
48
The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dam Maps. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
dammaps.jp
611 ms
js
37 ms
jquery.min.js
33 ms
jquery-ui.css
73 ms
jquery-ui.min.js
105 ms
markermanager.js
514 ms
dammaps.js
566 ms
dammaps_const.js
384 ms
main.css
375 ms
control.css
386 ms
counter.js
487 ms
title_logo.png
405 ms
13
217 ms
common.js
19 ms
util.js
39 ms
infowindow.js
36 ms
marker.js
39 ms
ui-bg_flat_75_ffffff_40x100.png
13 ms
map.js
14 ms
overlay.js
13 ms
ui-bg_glass_75_e6e6e6_1x400.png
53 ms
StaticMapService.GetMapImage
53 ms
onion.js
31 ms
openhand_8_8.cur
21 ms
ViewportInfoService.GetViewportInfo
130 ms
stats.js
32 ms
controls.js
27 ms
ViewportInfoService.GetViewportInfo
107 ms
transparent.png
18 ms
kh
107 ms
kh
108 ms
css
53 ms
google4.png
63 ms
mapcnt6.png
39 ms
zN7GBFwfMP4uA6AR0HCoLQ.ttf
38 ms
RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf
39 ms
Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf
38 ms
d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf
38 ms
tmapctrl.png
38 ms
cb_scout5.png
40 ms
tmapctrl4.png
39 ms
imgs8.png
39 ms
vt
33 ms
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31 ms
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61 ms
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39 ms
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35 ms
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65 ms
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113 ms
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123 ms
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125 ms
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128 ms
vt
154 ms
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AuthenticationService.Authenticate
371 ms
dammaps.jp accessibility score
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
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
Form elements do not have associated labels
Links do not have a discernible name
dammaps.jp 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
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
dammaps.jp SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
JA
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dammaps.jp 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 Dammaps.jp 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.
dammaps.jp
Open Graph description is not detected on the main page of Dam Maps. 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: