Go Workshop

Miki Tebeka 📬 [email protected], 𝕏 @tebeka, 👨 mikitebeka, ✒️blog

Shameless Plugs

• LinkedIn Learning Classes
• Books

Syllabus

---

Session 1: RPC

Agenda

• Advanced JSON
  • Custom serialization
  • Missing vs empty values
  • Streaming JSON
• HTTP clients
  • Request body
  • Streaming
  • Authentication
• HTTP servers
  • Dependency injection
  • Writing middleware
  • Streaming responses
  • Routing

Code

• value.go - Custom serialization
• vm.go - Missing vs empty
• logs.go - Steaming JSON
• client.go - HTTP Clients

Links

• Installing Multiple Versions of Go
  • You can set GOROOT to ~/sdk/go1.24.3, see GoLand instructions here
• Year 2038 Problem
• Method Sets
• mapstructure - map[string]any -> struct
• Server Side Events in Go
• Chunked Transfer Encoding
• JSON Lines
• HTTP Status Cats
• Fixing For Loops in Go 1.22
• JSON - The Fine Print

Data & Other

• Syllabus

---

Session 2: Going Faster

Agenda

• Benchmarking & profiling
  • tokenizer
• Performance tips & tricks
• Optimizing memory

Code

• tokenizer - Benchmark, profile, CPU & memory
• store - cache & serialization
• matrix - CPU cache friendly
• playground - This & that ☺

Links

• The Architecture of Open Source Applications - Including a book on performance
• Plain Text - Fun talk about Unicode
• Regular Expression Matching Can Be Simple And Fast
• Locality of Behaviour
• Rules of Optimization Club
• Computer Latency at Human Scale
• So you wanna go fast
• High Performance Go
• Miki's Optimization Overview
• A Benchmarking Checklist
• A Guide to the Go Garbage Collector
• hey
• Garbage Collection In Go : Part I - Semantics
• benchstat

Day 3: Advanced Concurrency

Agenda

• Channel semantics
• Goroutine pools
• The "sync" & "sync/atomic" packages
• Handling panics in goroutines

Code

• counter.go - The race detector, mutex, sync/atomic

• token.go - Refresh token, using RWMutex

• token.go - Refresh token, using channels

• pmap.go - Parallel map

• payment.go - sync.Once

• pool.go - Resource pool & sync.Pool

• taxi_check.go - Convert sequential to concurrent, pool

• go_chan.go - Channel semantics, goroutines

• worker_pool.go - Goroutine pool, return channel

• fan_in.go - Fan in pattern

• panic.go - Guarding against panics

Links

• automaxprocs
• x/time/rate - Rate limiter
• The race detector
• errgroup
• Data Race Patterns in Go
• Go Concurrency Patterns: Pipelines and cancellation
• Go Concurrency Patterns: Context
• Curious Channels
• The Behavior of Channels
• Channel Semantics
• Why are there nil channels in Go?
• Amdahl's Law - Limits of concurrency
• Computer Latency at Human Scale
• Concurrency is not Parallelism by Rob Pike
• Scheduling in Go by Bill Kennedy
• conc: better structured concurrency for go
• GopherCon Israel 2025 Videos
• lru-cache
• singleflight
• huh - UI in terminal
  • Uses bubbletea

Data & More

• rtb.go
• taxi.tar

---

Session 4: OO Patterns

Agenda

• Pointer vs value semantics
• Embedding structs
• Interfaces in depth
• The empty interface and type assertions
• Iterators

Code

• driver.go - Why you can't do inheritance

• game.go - Structs, methods & interfaces

• error.go - When an interface is nil

• sha1.go - Combining io.Reader & io.Writer

• wc.go - Implement io.Writer

• logger.go - Keeping interface small with reflection

• site.go - Sub routers

• client_test.go - Mocking http.RoundTripper

• empty.go - The empty interface (any)

• stats.go - Generics

• iter.go - Iterators

Links

• Feynman Algorithm
• Generics can make your Go code slower
• Coroutines for Go by Russ Cox
• sort examples - Read and try to understand
• When to use generics
• Generics tutorial
• Generic Interfaces
• Methods, interfaces & embedded types in Go
• Methods & Interfaces in the Go tour
• wrapMiddle in Ardan Labs service
• chi - Example of chaining middleware
• List of file signatures
• Method Sets

---

Session 5: Project Engineering

Agenda

• Creating go executables
  • Injecting version
  • Embedding assets
• Configuration & command line parsing
• Logging & metrics
• Writing secure Go code

Code

• collatz - Debugging goroutines

• gosay - Building executables

• spinner.go - Terminal spinner

• grep.go - Terminal and command line

• logging.go - Logging

• log_design.go - Logger design

Links

• Using ldflags to Set Version Information for Go Applications

• GoReleaser

  • GitHub Action

• svu - Bump version

• Using Zig to Compile Cgo

• Command line & Options

  • flag
  • Cobra + Viper
  • Ardan Labs conf

• Security

  • mkcert
  • x/crypto/autocert
  • Using Let's Encrypt in Go
  • Customizing Binaries with Build Tags

• tar joke

• Reversim Summit - October 27,28

• Writing Deployable Code

• The Twelve Factor App

• TOML format

• Knight Capital Group - Cost of configuration error

• The Art of Unix Programming PDF

• Generating Code - go:generate

• embed package

• Debug a Go Application Running on Kubernetes

• Core Dump Debugging

• Leek & Seek - A lot of diagnostic advices and tools

• Go: Monitor your goroutine

• Diagnostics in the Go docs

• Structured Logging with slog

• OWASP Top 10

• Security Linters

  • gosec
  • govulncheck
  • gitleaks

• Certificates

  • mkcert for local development
  • letsencrypt - Free certificates

• OPA - Authorization

• Validation

  • validator

• Code Structure

  • Organizing a Go Module
  • ArdanLabs service

• zap log to screen & file

• Estimation

• ANSI escape code - Colors in your terminal

• libffi - Scary C code

  • Does FFI

• cgo

• Terminals supporting graphics

  • ghostty
  • kitty

Data & Other

• gopher.txt
• Secure Code Slides
• journal.tar.gz