Deep dive on Go's map internals in Go 1.24 and how the runtime moved from the classic bucket + overflow-chain design to a Swiss Table-inspired implementation:

• what changed structurally in the runtime
• how control bytes and h2 filtering reduce wasted key comparisons
• why this improves cache behavior and practical load factors
• Go-specific constraints (iteration semantics, GC integration, incremental growth behavior)
• benchmark context and caveats (microbench wins vs smaller app-level geomean gains)
• current trade-offs and open performance areas