Access yis.ac.jp. Yokohama International School

name

value

score

weighting

FCP (First Contentful Paint)

Value5.7 s

5/100

10%

LCP (Largest Contentful Paint)

Value19.2 s

0/100

25%

SI (Speed Index)

Value16.4 s

0/100

10%

TBT (Total Blocking Time)

Value3,900 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.531

14/100

15%

TTI (Time to Interactive)

Value19.6 s

2/100

10%

yis.ac.jp

66 ms

www.yis.ac.jp

1495 ms

application-3d571c26adcaf21a729ffd3fab5c4f03.css

27 ms

styles.cfm

51 ms

main.css

102 ms

Our browser made a total of 115 requests to load all elements on the main page. We found that 38% of them (44 requests) were addressed to the original Yis.ac.jp, 9% (10 requests) were made to Use.typekit.net and 8% (9 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Yis.ac.jp.

Content Size

7.9 MB

After Optimization

6.1 MB

In fact, the total size of Yis.ac.jp main page is 7.9 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 5.6 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 112.8 kB

Original 136.1 kB
After minification 131.4 kB
After compression 23.4 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. 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 112.8 kB or 83% of the original size.

Image Optimization

-2%

Potential reduce by 117.7 kB

Original 5.6 MB
After minification 5.5 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. Yis images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 1.3 MB

Original 1.9 MB
After minification 1.9 MB
After compression 592.7 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 1.3 MB or 69% of the original size.

CSS Optimization

-87%

Potential reduce by 242.0 kB

Original 277.8 kB
After minification 233.0 kB
After compression 35.8 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. Yis.ac.jp needs all CSS files to be minified and compressed as it can save up to 242.0 kB or 87% of the original size.

Requests Now

101

After Optimization

The browser has sent 101 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Yis. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 10 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-hidden="true"] elements contain focusable descendents

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

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 keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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

High

Links do not have descriptive text

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

High

Links are not crawlable

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 uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

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

Social Sharing Optimization

yis.ac.jp

Open Graph description is not detected on the main page of Yis. 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

Yokohama International School

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

yis.ac.jp

www.yis.ac.jp

application-3d571c26adcaf21a729ffd3fab5c4f03.css

styles.cfm

main.css

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

yis.ac.jp

www.yis.ac.jp

application-3d571c26adcaf21a729ffd3fab5c4f03.css

styles.cfm

main.css

in_layout_head-b2c3537e625ca833ec84b52d25370616.js

xua3ojz.js

support.custom.updated.js

font-awesome.min.css

support.custom.css

application-a1c175890c25c82a68369c01975f4fe4.js

main.updated.js

css

logo.png

dropdown_square_menu_2015-16-8115.jpg

dropdown_square_menu_2015-16-8370.jpg

dropdown_square_menu_2015-16-8380.jpg

dropdown_square_menu_2015-16-4.jpg

dropdown_square_menu_2015-16-18.jpg

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1145.512.jpg

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1111.512.jpg

ib-world-school-logo-2-colour.png

NEASC.png

CIS.png

gtm.js

www.yis.ac.jp

cse.js

frontend-sbf3cc9bef9-d05d784d5cf78860c156a7f036013f46.png

1305.full.jpg

1298.full.jpg

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