Analyze 本を売るならBOOKOFF(ブックオフ)


Page load speed analysis

  • 43/100

    Normal result
  • 4

    Successful tests
  • 4

    Failed tests
  • First response

    495 ms

  • Resources loaded

    10.7 sec

  • Page rendered

    283 ms

  • Total page load time

    11.5 sec

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

We analyzed page load time and found that the first response time was 495 ms and then it took 11 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Page optimization

  • HTML 55.3 kB
    Images 1.5 MB
    Javascripts 504.4 kB
    CSS 85.5 kB

    In fact, the total size of main page is 2.2 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. 50% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

    • Original 55.3 kB
    • After minification 48.6 kB
    • After compression 11.4 kB

    HTML optimization

    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 6.7 kB, which is 12% 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 43.9 kB or 79% of the original size.

    • Original 1.5 MB
    • After optimization 1.5 MB

    Image optimization

    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. Bookoff images are well optimized though.

    • Original 504.4 kB
    • After minification 421.3 kB
    • After compression 141.8 kB

    JavaScript optimization

    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 362.5 kB or 72% of the original size.

    • Original 85.5 kB
    • After minification 66.5 kB
    • After compression 13.4 kB

    CSS optimization

    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 72.0 kB or 84% of the original size.

Network requests diagram

  • reset.css
  • common.css
  • font_medium_w.css
  • jquery.jscrollpane.css
  • core-ui-select.css
  • colorbox.css
  • placeholder.css
  • style.css
  • mainvisual.css
  • jquery-1.7.1.min.js
  • jquery.easing.js
  • jquery.mousewheel.js
  • jquery.jscrollpane.min.js
  • jquery.core-ui-select.js
  • jquery.colorbox-min.js
  • search.js
  • common.js
  • jquery.placeholder.js
  • common.loadlast.js
  • mainvisual.js
  • yahoo-auction-manager.js
  • top.js
  • jquery.searchshop-common.js
  • searchshop-side.js
  • header-logo.gif
  • serchbtn-bg-01.gif
  • header-textsize-tit.gif
  • header-textsize-l-of.gif
  • header-textsize-m-of.gif
  • header-textsize-s-of.gif
  • header-util-list-sp-close-btn-img.gif
  • gnavi-img-01.gif
  • gnavi-img-02.gif
  • gnavi-img-03.gif
  • gnavi-img-04.gif
  • gnavi-img-05.gif
  • gnavi-img-06.gif
  • dummy.png
  • 29_new_1.jpg
  • 201411_boltakuhon707.jpg
  • topbig.png
  • sp-top-visual-back-arr.png
  • sp-top-visual-next-arr.png
  • 29s.jpg
  • 201411_boltakuhon218.jpg
  • topthum.png
  • top-main-shop-search.png
  • top-unit-bg-01.jpg
  • top-unit-img-03.jpg
  • top-unit-img-02.jpg
  • top-unit-img-06.png
  • top-unit-img-07.jpg
  • top-unit-img-08_2.jpg
  • top-rss-ico.gif
  • sp_index_facebook.gif
  • sp_index_twitter.gif
  • sp_index_reuse.png
  • top-unit-img-09.png
  • sp_index_yomuyomu.jpg
  • gtm.js
  • top-unit-img-10.jpg
  • analytics.js
  • widgets.js
  • search
  • likebox.php
  • conversion_async.js
  • l
  • s_retargeting.js
  • fbevents.js
  • linkid.js
  • m_login.php
  • collect
  • collect
  • collect
  • collect
  • page-top-btn.gif
  • ga-audiences
  • b6KRNFzKpcz.css
  • XxW80wE8xXB.css
  • 4SdJwCnTSq3.css
  • HRmq9d9FqoF.css
  • WBfRZkHE5ec.css
  • _rx8naC75Dy.js
  • x5F9OMjKyLw.js
  • ICDbTSzjQEg.js
  • TTCre3391I0.js
  • njO1TPvGzoR.js
  • b_6HNn_J2BZ.js
  • 7cm7D75Y0Sf.js
  • rFmE1g6Dkoz.js
  • 336JejShbZp.js
  • footer-logo.gif
  • footer-copy.gif
  • ico-arrow-blue-pc.gif
  • title-area-pc-bg-01.gif
  • pc-top-visual-arr.png
  • cs
  • NavicastApi.js
  • contents-wrap-bg.gif
  • ico-arrow-blue-square-pc.gif
  • top-h3-ico-01.gif
  • location-pulldown-bg.gif
  • top-h3-ico-02.gif
  • ico-arrow-clear-pc.png
  • m_login.php
  • 10003519_268222266691908_1096594085_n.jpg
  • safe_image.php
  • 11694863_460720494108750_7918880368593943550_n.jpg
  • 12742688_537170486463750_7427718625458771341_n.jpg
  • 10329272_537170609797071_4720306665839544986_n.jpg
  • 10400260_537170673130398_7428318501952594240_n.jpg
  • 12790932_537170899797042_1832202779092834381_n.jpg
  • 12733580_536784756502323_4570564372624836086_n.jpg
  • 10155063_536789623168503_4873971660628199787_n.jpg
  • 12743869_536818786498920_2973733516933712539_n.jpg
  • 12743927_536039153243550_8546464578745771286_n.jpg
  • 12734253_536039169910215_301525740340378349_n.jpg
  • safe_image.php
  • wL6VQj7Ab77.png
  • s7jcwEQH7Sx.png
  • QDwYpIaRyfG.png
  • a-ZN6WoEOje.png
  • acs
  • ico-arrow-white-pc.gif
  • sp-top-visual-arr.png
  • bookoff2014-thumb-aa2489185816005765040800835697760968602025.jpg
  • bookoff2014-thumb-aa1494030433300023307514295493780942860772.jpg
  • bookoff2014-thumb-aa1156346992228933174708956457380292493088.jpg
  • bookoff2014-thumb-aa0749453365244261373219906698462801311666.jpg
  • bookoff2014-thumb-aa2720095693119104426836377861501762594292.jpg
  • bookoff2014-thumb-aa0780595856051802518403789276282774675380.jpg
  • NavicastTmg.php
  • NavicastApi2.php
  • iframe.css
  • placeholder.css
  • ga.php
  • I6-MnjEovm5.js
  • vlXaquuXMrr.js
  • NavicastApi2.php
  • conversion.js
  • bi.js
  • member-info-top-bg.png
  • member-info-contents-bg.png
  • gtm.js
  • conversion_async.js
  • conversion.js
  • conversion.js
  • conversion.js
  • conversion.js
  • segmentation.js
  • cnt
  • s_retargeting.js
  • font_large_w.css
  • fbevents.js
  • font_small_w.css
  • beacon.html
  • header-textsize-l-on.gif
  • header-textsize-m-on.gif
  • header-textsize-s-on.gif
  • gnavi-img-01-on.gif
  • gnavi-img-02-on.gif
  • gnavi-img-03-on.gif
  • gnavi-img-04-on.gif
  • gnavi-img-05-on.gif
  • gnavi-img-06-on.gif
  • pixel
  • cs
  • Pug
  • set
  • sd
  • tap.php
  • sync
  • sync
  • mapuser
  • sync
  • sync

Our browser made a total of 199 requests to load all elements on the main page. We found that 44% of them (87 requests) were addressed to the original, 10% (20 requests) were made to and 6% (11 requests) were made to The less responsive or slowest element that took the longest time to load (4.4 sec) belongs to the original domain

Additional info on


The browser has sent 186 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bookoff. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 49 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.











Possible request optimization













Normal result


As for redirects, our browser was forwarded to before it reached this domain.

IP address uses IP addresses which are currently shared with 16 other domains. The more sites share the same stack of IP addresses, the higher the host server’s workload is. It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.

Normal result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 278
A 278
NS 300
NS 300

300 Mname:
Serial: 1636444722
Refresh: 3600
Retry: 1800
Expire: 3600000
Minimum-ttl: 900

HTTPS certificate

SSL Certificate has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Poor result

Visitor World Map

Country of origin for 93% of all visits is Japan. It lies approximately 4830 miles away from the server location (United States) and such a long distance can negatively affect website speed, as it takes some time for data to travel back and forth between those places. That’s why one of the best ways to speed up page load time for the majority of users is moving the server to Japan or just closer to the user base.

Poor result

Poor result

Social Sharing Optimization

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

Language and encoding

Good result


JA ja language flag


JA ja language flag





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 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.

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