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  6. What is Speed Index?

What is Speed Index?

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last updated:Nov 25, 2025

Spelldata
Spelldata
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Further indicators to "visualize" customer experience! We will introduce issues related to display metrics in our blog.

In the April update of our web performance measurement and monitoring service, Catchpoint, we have added support for Speed Index. Speed Index is a metric that was added to the open-source website measurement tool Webpage Test, which Google supports in the development and deployment of measurement servers, in April 2012. It represents how quickly a web page is displayed and visualized, with smaller values indicating better performance. 【Overview】 ■ Traditional metrics ■ Issues with display-related metrics ■ Introduction of Speed Index ■ Speed Index of Japanese websites ■ Speed Index of the top 10,000 .com sites on Alexa *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

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Speed-Indexとは何か.jpg

What is Speed Index?

Speed-Indexとは何か.jpg
Speed-Indexとは何か.jpg
  • Related Link - https://spelldata.co.jp/blog/blog-2017-05-05.html

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What is Speed Index?

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Spelldata

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We have established and operate measurement and monitoring centers in five cities across the country (Sapporo, Niigata, Tokyo, Osaka, and Fukuoka). The measurement and monitoring systems in operation there are also used by major IT companies such as Google and Microsoft, as well as e-commerce sites and mobile companies like Verizon. We monitor the communication status of your web systems from various locations 24/7, analyze the data, optimize it, and support high-speed and stable web operations. We can detect communication failures and server issues, which have been occurring frequently lately, through measurements from across the country and immediately raise alerts. Additionally, we provide a web performance tuning service that ensures the display speed of websites, web applications, and mobile applications is completed within one second nationwide, achieving a 98% yield. Based on statistical quality control, we conduct data collection and analysis, and guarantee the achievement of displaying within one second through genuine performance tuning that addresses issues from the source code. Please feel free to contact us if you have any requests.

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