Simple & Reliable Monitoring That Scales

The io.Reader and io.Writer interfaces are probably some of the most common tools. Today, we’re kicking off the I/O series by taking a look at a lot of these readers and writers, and pointing out some common mistakes — like using io.ReadAll in ways that can backfire.

Go’s sync.Map isn’t a magic bullet for all concurrent map needs. It’s got some good tricks up its sleeve, like handling reads without locking, but it’s not always the best choice. This article dives into how sync.Map works under the hood, from its two-map system to the bottom line of expunged entries.

When you’ve got several identical values in your code, you only store one copy. Instead of having several copies of the same thing, they all just point to this one version, which is a lot more efficient. It’s a process often called ‘interning’ in programming circles.