Why Go’s Empty Struct Takes Zero Bytes and How to Leverage It

This article explains the zero‑byte nature of Go’s empty struct, how the runtime treats zero‑size allocations, why multiple instances share the same address, and demonstrates practical patterns such as set maps, signal channels, and worker coordination that improve memory efficiency and performance.

channel signalingempty structmap set

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Why Go’s Empty Struct Takes Zero Bytes and How to Leverage It

Radish, Keep Going!

Jan 20, 2025 · Fundamentals

Why Go’s Empty Struct Takes Zero Memory and How to Leverage It

Go’s empty struct occupies zero bytes thanks to a special zerobase address, and understanding this behavior reveals how to use empty structs for memory‑efficient patterns such as sets, signal channels, and struct alignment tricks.

ChannelMAPMemory Optimization

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Why Go’s Empty Struct Takes Zero Memory and How to Leverage It

Go Programming World

Jun 4, 2024 · Backend Development

Understanding and Using Empty Structs (struct{}) in Go

This article explains the zero‑size nature of Go's empty struct, demonstrates how its memory address behaves, shows its impact on struct alignment, and presents multiple practical patterns such as set implementation, large arrays, signal channels, no‑op methods, interface stubs, and the noCopy identifier.

ChannelInterfaceMemory

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Understanding and Using Empty Structs (struct{}) in Go