Three new books, Go Optimizations 101, Go Details & Tips 101 and Go Generics 101 are published now. It is most cost-effective to buy all of them through this book bundle in the Leanpub book store.

Go Optimizations 101

This book provides some code performance optimization tricks, tips, and suggestions, which include

how to consume less CPU resources.
how to consume less memory.
how to make less memory allocations.
how to control memory allocation places.
how to reduce garbage collection pressure.

(Please follow Go 101's official Twitter account @go100and1 to get latest Go 101 news and learn all kinds of Go knowledge.)

(about 150 pages, 75+ facts and suggestions)

The digital versions of this book are available at the following places:

Leanpub store, $7.99+ (Or buy this book through this or this book bundle).
Apple Books store, $7.99.
Amazon Kindle store, $7.99.

(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.

Index:

Acknowledgments
About Go Optimizations 101
Value Parts and Value Sizes ^{(available in the paid ebooks)}

value/type sizes
memory alignments
struct padding
avoid larger copy costs

Memory Allocations
Stack and Escape Analysis ^{(available in the paid ebooks)}

escape analysis
how to control value allocation places
stacks growth and shrinkage
how to reduce stack grow times

Garbage Collection ^{(available in the paid ebooks)}

GC pacer
how to reduce GC pressure
control GC frequency

Pointers
Structs ^{(available in the paid ebooks)}

3 facts/suggestions

Arrays and Slices ^{(available in the paid ebooks)}

10+ facts/suggestions

String and Byte Slices ^{(available in the paid ebooks)}

10+ facts/suggestions

BCE (Bound Check Eliminate) ^{(available in the paid ebooks)}

the cases BCE works for
the cases BCE doesn't work for
the cases BCE works for when given hints

Maps
Channels ^{(available in the paid ebooks)}

3 facts/suggestions

Functions ^{(available in the paid ebooks)}

how to make a function inline-able
how to make a function not inline-able
pointer parameters/results vs. non-pointer ones
named results vs. anonymous ones
10+ facts/suggestions

Interfaces ^{(available in the paid ebooks)}

value boxing costs
3+ facts/suggestions

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.

If you would like to learn some Go details and facts every serveral days, please follow Go 101's official Twitter account @go100and1 or join Go 101 slack channels.

Tapir, the author of Go 101, has been on writing the Go 101 series books and maintaining the go101.org website since 2016 July. New contents will be continually added to the book and the website from time to time. Tapir is also an indie game developer. You can also support Go 101 by playing Tapir's games (made for both Android and iPhone/iPad):

Color Infection (★★★★★), a physics based original casual puzzle game. 140+ levels.
Rectangle Pushers (★★★★★), an original casual puzzle game. Two modes, 104+ levels.
Let's Play With Particles, a casual action original game. Three mini games are included.

Individual donations via PayPal are also welcome.