DigiNews

Summary

This article investigates how amd64 microarchitecture levels (v1–v4) affect Go performance, using Roaring Bitmap benchmarks on modern hardware. It finds that enabling popcnt at v2 yields a ~43% speedup for population counts, while v3 (AVX2) provides additional gains in certain code paths; v4 often adds little, suggesting a move toward finer-grained feature detection and benchmarking on current hardware.