Access boatrace-tamagawa.com. ボートレース多摩川 Official Site - ボートレース多摩川オフィシャルサイトトップページ

name

value

score

weighting

FCP (First Contentful Paint)

Value6.2 s

3/100

10%

LCP (Largest Contentful Paint)

Value16.0 s

0/100

25%

SI (Speed Index)

Value12.5 s

3/100

10%

TBT (Total Blocking Time)

Value620 ms

48/100

30%

CLS (Cumulative Layout Shift)

Value0.397

25/100

15%

TTI (Time to Interactive)

Value21.0 s

1/100

10%

boatrace-tamagawa.com

1351 ms

common.css

707 ms

top.css

531 ms

jquery-1.11.2.min.js

1168 ms

jquery.bxslider.min.js

754 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that 95% of them (81 requests) were addressed to the original Boatrace-tamagawa.com, 2% (2 requests) were made to Staticxx.facebook.com and 1% (1 request) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (4.2 sec) belongs to the original domain Boatrace-tamagawa.com.

Content Size

1.6 MB

After Optimization

1.3 MB

In fact, the total size of Boatrace-tamagawa.com 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. 25% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 42.3 kB

Original 51.7 kB
After minification 43.6 kB
After compression 9.4 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 8.1 kB, which is 16% 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 42.3 kB or 82% of the original size.

Image Optimization

-3%

Potential reduce by 38.1 kB

Original 1.3 MB
After minification 1.3 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. Boatrace Tamagawa images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 142.2 kB

Original 197.9 kB
After minification 174.9 kB
After compression 55.7 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 142.2 kB or 72% of the original size.

CSS Optimization

-82%

Potential reduce by 26.5 kB

Original 32.3 kB
After minification 23.1 kB
After compression 5.8 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. Boatrace-tamagawa.com needs all CSS files to be minified and compressed as it can save up to 26.5 kB or 82% of the original size.

Requests Now

After Optimization

The browser has sent 84 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Boatrace Tamagawa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-*] attributes do not match their roles

High

[aria-hidden="true"] elements contain focusable descendents

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[aria-*] attributes do not have valid values

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.

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

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

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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/).

High

Document doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

JA
Language Claimed

JA
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Boatrace-tamagawa.com can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it matches the claimed language. Our system also found out that Boatrace-tamagawa.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.

Social Sharing Optimization

boatrace-tamagawa.com

Open Graph description is not detected on the main page of Boatrace Tamagawa. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

ボートレース多摩川 Official Site - ボートレース多摩川 オフィシャルサイト トップページ

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

boatrace-tamagawa.com

common.css

top.css

jquery-1.11.2.min.js

jquery.bxslider.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

boatrace-tamagawa.com

common.css

top.css

jquery-1.11.2.min.js

jquery.bxslider.min.js

common.js

pctosmart.js

jquery.cycle.all.js

jquery.jscrollpane.min.js

jquery.mousewheel.js

jquery.marquee.min.js

bg_structure.png

bg_hnav.png

img_hnav_logo.png

txt_hnav_ongoing.png

btn_hnav_menu_off.png

bg_black70.png

ttl_gnav_01.png

ttl_gnav_02.png

ttl_gnav_03.png

img_gnav_01.png

bg_header.png

bg_mv_01.png

img_mv_slide_01.jpg

ico_arw_01.png

img_mv_slide_24.jpg

img_mv_slide_15.jpg

img_mv_slide_02.jpg

img_mv_slide_03.jpg

bg_mv_02.png

img_mv_01.jpg

img_mv_02.jpg

bg_mv_03.png

btn_mv_01_off.png

btn_mv_02_off.png

btn_mv_03_off.png

btn_mv_04_off.png

btn_mv_05_off.png

bg_ongoing_01.png

bg_ongoing_top.png

bg_ongoing_inner.png

txt_top_box_01_01.jpg

img_top_box_01_01.jpg

ボートレース多摩川 Official Site - ボートレース多摩川オフィシャルサイトトップページ