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Jump Start Web Performance
book

Jump Start Web Performance

by Craig Buckler
February 2020
Intermediate to advanced
141 pages
2h 9m
English
SitePoint
Content preview from Jump Start Web Performance

Chapter 1: Web Performance Matters

The Cost of Poor Performance

Web obesity, slow downloads, and poor performance hit everyone—site users, online business owners, and even those who’ve never accessed the Web.

User Costs

At the start of 2020, the average web page comprises:

  • 27KB of HTML content
  • 64KB of CSS split over seven style sheets
  • four fonts, totaling 122KB
  • 410KB of JavaScript in 20 source files
  • 31 images, requiring 980KB of bandwidth (a third of these are off screen and may never be viewed!)

Average page weight in 2020

The total: 1,940KB of data made over 74 HTTP requests, which takes seven seconds to fully appear on the average user’s desktop worldwide. This increases ...

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Publisher Resources

ISBN: 9781098122799Errata Page