Report Summary

  • 73

    Performance

    Renders faster than
    82% of other websites

  • 54

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    29% of websites

  • 67

    SEO

    Google-friendlier than
    35% of websites

tombozukan.net

トンボフィールド観察記

Page Load Speed

4.9 sec in total

First Response

772 ms

Resources Loaded

3.8 sec

Page Rendered

285 ms

tombozukan.net screenshot

About Website

Welcome to tombozukan.net homepage info - get ready to check Tombozukan best content for Japan right away, or after learning these important things about tombozukan.net

トンボフィールド観察記へようこそ!日本国内で記録のあるトンボを追っかけ、撮影できた種類を記録しております。

Visit tombozukan.net

Key Findings

We analyzed Tombozukan.net page load time and found that the first response time was 772 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

tombozukan.net performance score

73

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

58/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

26/100

25%

SI (Speed Index)

Value3.9 s

82/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.058

98/100

15%

TTI (Time to Interactive)

Value5.0 s

76/100

10%

Network Requests Diagram

tombozukan.net

772 ms

0638839

565 ms

043340700

769 ms

top-bn.png

1224 ms

top-whatsnew.gif

316 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 72% of them (28 requests) were addressed to the original Tombozukan.net, 5% (2 requests) were made to X4.enokorogusa.com and 5% (2 requests) were made to Ct1.shinobi.jp. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Tombozukan.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 135.5 kB (14%)

Content Size

977.8 kB

After Optimization

842.3 kB

In fact, the total size of Tombozukan.net main page is 977.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Images take 950.7 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 11.8 kB

  • Original 14.7 kB
  • After minification 14.1 kB
  • After compression 2.9 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 11.8 kB or 80% of the original size.

Image Optimization

-12%

Potential reduce by 116.4 kB

  • Original 950.7 kB
  • After minification 834.3 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. Obviously, Tombozukan needs image optimization as it can save up to 116.4 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-59%

Potential reduce by 7.3 kB

  • Original 12.4 kB
  • After minification 11.8 kB
  • After compression 5.1 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 7.3 kB or 59% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (29%)

Requests Now

38

After Optimization

27

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tombozukan. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

tombozukan.net accessibility score

54

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

tombozukan.net best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

tombozukan.net SEO score

67

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tombozukan.net 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 Tombozukan.net main page’s claimed encoding is shift_jis. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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