Go 1.24 replaces its old map runtime implementation with a Swiss Table-based design, improving performance. The article provides a gradual, visual walkthrough of how Go maps work internally, starting with the runtime Map struct and its pointer-based sharing behavior.
Background
Go maps are one of the most fundamental data structures in the language, and the Swiss Table approach (also used in C++23's std::unordered_map) offers better cache locality and lookup performance. This change in Go 1.24 represents a significant runtime overhaul.
- Source
- Lobsters
- Published
- Sep 3, 2026 at 06:50 PM
- Score
- 7.0 / 10