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Mastering Low-Latency: Implementing Custom Memory Allocators in Go

·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.