GopherCon 2018: Micro optimizing Go Code - George Tankersley

Everyone knows: if you need to go fast, bust out the assembly. But what if there’s better performance to be had just by writing Go more carefully? In this tutorial session, George will optimize a hash function in pure Go, starting from a direct implementation of the RFC and going until he beats the standard library. This will cover the whole process - starting with the naive code and a set of tests, then progressing through some algorithmic improvements and down the rabbit hole of program tuning. Along the way you'll see the performance impact of API design, some microbenchmarking pitfalls, an introduction to profiling, and a lot of practical tips for doing this kind of optimization. When the hash function runs out, George will draw further examples from the standard libraries (mostly crypto!) and other high performance Go projects.