Advanced Go Concurrency

f you’ve used Go for a while you’re probably aware of some of the basic Go concurrency primitives:

  • The go keyword for spawning goroutines
  • Channels, for communicating between goroutines
  • The context package for propagating cancellation
  • The sync and sync/atomic packages for lower-level primitives such as mutexes and atomic memory access

These language features and packages combine to provide a very rich set of tools for building concurrent applications. What you might not have discovered yet is a set of higher-level concurrency primitives available in the “extended standard library” available at We’ll be taking a look at these in this article.

Go: Discovery of the Trace Package

This article is based on Go 1.13.

Go provides us a tool to enable tracing during the runtime and get a detailed view of the execution of our program. This tool can be enabled by flag -trace with the tests, frompprof to get live tracing, or anywhere in our code thanks to the trace package. This tool can be even more powerful since you can enhance it with your own traces. Let’s review how it works.

The What, Why, and When of Single-Table Design with DynamoDB

Yet data modeling with DynamoDB is tricky for those used to the relational databases that have dominated for the past few decades. There are a number of quirks around data modeling with DynamoDB, but the biggest one is the recommendation from AWS to use a single table for all of your records.

In this post, we’ll do a deep dive on the concepts behind single-table design. You’ll learn: