This book provides some code performance optimization tricks, tips, and suggestions, which include
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(about 150 pages, 75+ facts and suggestions)
(Please note that the current prices are available for a limited period only. The price will be raised to $9.99 in a few days. Honestly speaking, the book is worth $20+.)
Tapir, the author of Go 101, has spent 5+ years on writing Go 101 series books and maintaining the go101.org website. New contents will be continually added to the book series and the website from time to time. Tapir is also an indie game developer. If you would like to, you can support the book and the website by playing Tapir's games (made for both Android and iPhone/iPad).
Thanks to Olexandr Shalakhin for the permission of using one of the wonderful gopher icon images in the book cover.
The Go 101 project is hosted on Github. Welcome to improve Go 101 articles by submitting corrections for all kinds of mistakes, such as typos, grammar errors, wording inaccuracies, description flaws, code bugs and broken links.