In 2019, I published a post called The Top 10 Most Common Mistakes I’ve Seen in Go Projects. As the name states, it was a way to explain some of the most common mistakes made by Go developers.

This post was pretty much popular (at least for me), and I…

A couple of months ago, I wrote a post about Go and CPU Caches: https://teivah.medium.com/go-and-cpu-caches-af5d32cc5592

Then, I wanted to extend the scope of this post. Following this idea, I had the chance to give a talk to GopherCon Turkey 2020. The topic is the following: Mechanical Sympathy in Go.

I tried to cover the following topics:

• CPU architecture introduction
• Locality of reference principles: temporal vs spatial locality, predictability, striding
• Data-oriented design: introduction, slice of structs vs struct of slices, etc.
• Pitfalls due to a bad utilization of CPU caches: cache associativity, critical stride
• Concurrency: false sharing

Here is the video of my talk:

The beginning of the talk was unfortunately ousted. Yet, you can find the slides here for the missing introduction:

• PDF version
• Keynote version

Problem

• Find the only element that appears once

In an unsorted array of integers, every element appears twice except for one element that appears only once. Return this element.Example:Input: a=[1, 4, 2, 4, 1, 3, 2]
Output: 3

• Category: Bit manipulation

Video:

With the rise of distributed architectures, consistent hashing became mainstream. But what is it exactly and how is it different from a standard hashing algorithm? What are the exact motivations behind it?

First, we will describe the main concepts. Then, we will dig into existing algorithms to understand the challenges…

TL;DR;

• ReactiveX is an API for asynchronous programming based on the observer pattern.
• RxGo is the official Go implementation of ReactiveX (a cousin of RxJS, RxJava, etc.).
• There are +50 new operators and multiple new features (hot vs cold observable, connectable observable, backpressure, etc.)
• Yes, Go has already great concurrency primitives…

I wanted to let you know that I just released Algo Deck. It is a free & open-source collection of +200 algorithmic cards.

Each card is a synthesized way to describe a concept. For example:

Let’s take a look at the Go package in charge to provide synchronization primitives: sync.

sync.Mutex

sync.Mutex is probably the most widely used primitive of the sync package. It allows a mutual exclusion on a shared resource (no simultaneous access):

It must be pointed out that a sync.Mutex cannot be…

This post is a summary of my 2-day experience at GopherCon UK 2019. I did not attend the first day (workshops only).

Disclaimer: In this post, I am expressing my opinions about some talks. Under no circumstances, I am making a value judgment on the speakers.

Finding Dependable Go Packages

The conference started with…