google speed index
 

how to calculate the google speed index

Perceptual Speed Index is a page stack execution metric that demonstrates to you how rapidly the substance of a page are unmistakably populated.

The Speed Index metric was added to Web Pagetest in April, 2012 and measures how quickly the page contents are visually populated (where lower numbers are better).

The Speed Index metric was added to Web Pagetest in April, 2012 and measures how quickly the page contents are visually populated (where lower numbers are better).

Perceptual Speed Index is a page load performance metric that shows you how quickly the contents of a page are visibly populated. The lower the score, the better.

The Speed Index metric was added to WebPagetest in April, 2012 and measures how quickly the page contents are visually populated (where lower numbers are better).

When you run a website through WebPagetest, the tool takes snapshots of the screen as your content loads. Each captured frame is scored for visual completeness above the fold, and each score is calculated using the following formula:

Interval time * (1 – visual completeness/100)

Time is represented in intervals of 500 millisecond, and visual completeness is the percentage of total above-the-fold content that has been loaded. Each frame is scored until all content is visible, and then all of the scores are added up to give you a speed index.

Perceptual Speed Index is a page load performance metric that shows you how quickly the contents of a page are visibly populated. The lower the score, the better.

Page speed is a measurement of how fast the content on your page loads. Google just announced that page speed will be a ranking factor in their mobile-first index. It's more important now than ever to increase your site's page speed. This will help to improve your overall UX and could help you rank higher.