Tools & Wizards About Us

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

is-tennis.com

インターナショナルスポーツ | 近畿最大級のテニススクール

Page Load Speed

9.1 sec in total

First Response

1.4 sec

Resources Loaded

7.1 sec

Page Rendered

662 ms

About Website

Click here to check amazing Is Tennis content. Otherwise, check out these important facts you probably never knew about is-tennis.com

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Key Findings

We analyzed Is-tennis.com page load time and found that the first response time was 1.4 sec and then it took 7.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

is-tennis.com performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value39.6 s

0/100

25%

SI (Speed Index)

Value14.3 s

1/100

10%

TBT (Total Blocking Time)

Value2,130 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.06

98/100

15%

TTI (Time to Interactive)

Value19.2 s

2/100

10%

Network Requests Diagram

is-tennis.com

1426 ms

style.min.css

343 ms

styles.css

513 ms

swiper.min.css

514 ms

style-min.css

688 ms

Our browser made a total of 136 requests to load all elements on the main page. We found that 71% of them (96 requests) were addressed to the original Is-tennis.com, 18% (25 requests) were made to Fonts.gstatic.com and 2% (3 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Is-tennis.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 598.8 kB (7%)

Content Size

8.4 MB

After Optimization

7.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Is-tennis.com main page is 8.4 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 7.4 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 540.6 kB

  • Original 594.7 kB
  • After minification 593.3 kB
  • After compression 54.0 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 540.6 kB or 91% of the original size.

Image Optimization

-0%

Potential reduce by 182 B

  • Original 7.4 MB
  • After minification 7.4 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. Is Tennis images are well optimized though.

JavaScript Optimization

-13%

Potential reduce by 44.1 kB

  • Original 328.0 kB
  • After minification 327.9 kB
  • After compression 284.0 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 44.1 kB or 13% of the original size.

CSS Optimization

-19%

Potential reduce by 14.0 kB

  • Original 73.2 kB
  • After minification 73.2 kB
  • After compression 59.2 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. Is-tennis.com needs all CSS files to be minified and compressed as it can save up to 14.0 kB or 19% of the original size.

Requests Breakdown

Number of requests can be reduced by 39 (37%)

Requests Now

105

After Optimization

66

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 105 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Is Tennis. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

is-tennis.com accessibility score

91

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

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

High

Links do not have a discernible name

Tables and lists

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

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

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

Best Practices

is-tennis.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

is-tennis.com SEO score

97

Search Engine Optimization Advices

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

High

Document uses 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 Is-tennis.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 Is-tennis.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

Open Graph description is not detected on the main page of Is Tennis. 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: