Go Internals

Mastering Low-Latency: Implementing Custom Memory Allocators in Go

10 October 2025·2369 words·12 mins

Performance Engineering Go Internals Systems Programming Go Memory-Management Optimization Unsafe Generics Garbage-Collection High-Frequency-Trading

Introduction # In the world of systems programming, memory management is the ultimate trade-off. Go (Golang) became famous because it abstracted this complexity away from us. The Go Runtime’s Garbage Collector (GC) is a marvel of engineering—it is concurrent, tri-color, and, as of 2025, incredibly efficient with sub-millisecond pause times for most workloads.

Mastering the Go Scheduler: A Deep Dive into Goroutines and the G-M-P Model

1 October 2025·2076 words·10 mins

Go Internals Performance Engineering Advanced Go Go-Scheduler Concurrency Performance Goroutines Go-Internals System Design Multi-Threading

Introduction # If you have been writing Go for any length of time, you likely know the “magic” of the language: put the keyword go in front of a function, and it runs concurrently. It feels almost free. You can spawn 100,000 goroutines on a standard laptop, and the program just hums along. Try doing that with Java threads or OS pthreads, and your machine will likely grind to a halt before you hit 10,000.

Under the Hood: A Comprehensive Guide to Go Memory Management & Garbage Collector

1 September 2025·2175 words·11 mins

Performance Go Internals System Architecture Go-Internals Garbage-Collection Memory-Management Performance-Tuning Go-1-24 Profiling

If you have been writing Go for a few years, you likely appreciate its simplicity. You don’t have to manually malloc or free memory like in C, nor do you have to wrestle with the complex borrow checker of Rust. Go just works.