Access sekigin.jp. 技術情報館「SEKIGIN」(セキジン)｜鉄道や道路を中心にインフラの歴史と現状，鋼橋の維持管理，鋼を中心とする金属腐食，防食・防せいに用いる材料として塗料・塗装，めっき，溶射などの技術，生活の中の科...

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

40/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

48/100

25%

SI (Speed Index)

Value4.3 s

75/100

10%

TBT (Total Blocking Time)

Value2,700 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.378

28/100

15%

TTI (Time to Interactive)

Value10.8 s

22/100

10%

sekigin.jp

731 ms

style1.css

328 ms

adsbygoogle.js

48 ms

gradation1.png

166 ms

Our browser made a total of 4 requests to load all elements on the main page. We found that 75% of them (3 requests) were addressed to the original Sekigin.jp, 25% (1 request) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (731 ms) belongs to the original domain Sekigin.jp.

Content Size

142.7 kB

After Optimization

94.1 kB

In fact, the total size of Sekigin.jp main page is 142.7 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. Only 10% of websites need less resources to load. Javascripts take 63.6 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 34.9 kB

Original 44.0 kB
After minification 32.7 kB
After compression 9.0 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. This page needs HTML code to be minified as it can gain 11.3 kB, which is 26% 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 34.9 kB or 79% of the original size.

Image Optimization

-30%

Potential reduce by 8.8 kB

Original 29.4 kB
After minification 20.7 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, SEKIGIN needs image optimization as it can save up to 8.8 kB or 30% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 20 B

Original 63.6 kB
After minification 63.6 kB
After compression 63.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-86%

Potential reduce by 4.9 kB

Original 5.7 kB
After minification 2.5 kB
After compression 813 B

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. Sekigin.jp needs all CSS files to be minified and compressed as it can save up to 4.9 kB or 86% of the original size.

Requests Now

After Optimization

The browser has sent 3 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SEKIGIN. According to our analytics all requests are already optimized.