Report Summary

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    Best Practices

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トレファク公式ファッション通販【TREFAC FASHION】|ブランド品や人気の古着を販売

Page Load Speed

5.2 sec in total

First Response

558 ms

Resources Loaded

4.3 sec

Page Rendered

354 ms screenshot

About Website

Visit now to see the best up-to-date TREFAC content for Japan and also check out these interesting facts you probably never knew about

トレファク公式ブランド・古着オンラインストア【TREFAC FASHION (トレファクファッション)】メンズ、レディース、ブランド、ジャンル問わず毎日大量入荷中。未使用品も多数取り扱い。


Key Findings

We analyzed page load time and found that the first response time was 558 ms and then it took 4.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics performance score


Network Requests Diagram

558 ms

862 ms


485 ms


492 ms


70 ms

Our browser made a total of 89 requests to load all elements on the main page. We found that 81% of them (72 requests) were addressed to the original, 11% (10 requests) were made to and 2% (2 requests) were made to The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain

Page Optimization Overview & Recommendations

Page size can be reduced by 104.5 kB (16%)

Content Size

638.8 kB

After Optimization

534.3 kB

In fact, the total size of main page is 638.8 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. 25% of websites need less resources to load. Images take 508.3 kB which makes up the majority of the site volume.

HTML Optimization


Potential reduce by 21.9 kB

  • Original 27.9 kB
  • After minification 25.1 kB
  • After compression 6.0 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 21.9 kB or 79% of the original size.

Image Optimization


Potential reduce by 16.5 kB

  • Original 508.3 kB
  • After minification 491.8 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. TREFAC images are well optimized though.

JavaScript Optimization


Potential reduce by 50.7 kB

  • Original 83.6 kB
  • After minification 63.8 kB
  • After compression 32.9 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 50.7 kB or 61% of the original size.

CSS Optimization


Potential reduce by 15.3 kB

  • Original 19.0 kB
  • After minification 12.9 kB
  • After compression 3.7 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. needs all CSS files to be minified and compressed as it can save up to 15.3 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (28%)

Requests Now


After Optimization


The browser has sent 87 CSS, Javascripts, AJAX and image requests in order to completely render the main page of TREFAC. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

SEO Factors SEO score


Language and Encoding

  • Language Detected


  • Language Claimed


  • Encoding


Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 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 main page’s claimed encoding is euc-jp. 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 TREFAC. 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: