runtime: green tea garbage collector · Issue #73581 · golang/go

How Go 1.25's experimental garbage collector stops CPU stalls by organizing memory into neighborhoods instead of random object jumping

Green Tea 🍵 Garbage Collector Authors: Michael Knyszek, Austin Clements Updated: 15 August 2025 This issue tracks the design and implementation of the Green Tea garbage collector. As of the last up...

ℹ️ Disclaimer This post was written while Go 1.25 is the mainstream release. Some implementation details may change as the Go team continues to refine the garbage collector. Still, the ideas here should remain useful for building an intuition about what happens under the hood and why certain design choices exist. If you need the most up-to-date specifics, always refer to the official Go source and release notes.