Accelerating std::copy_if using SIMD
Summary
An in-depth look at SIMD-accelerated std::copy_if using AVX-512 on Zen 4, including a top-down performance analysis with PMCs, identification of frontend-bound and microcode bottlenecks, and a practical path to improvement via maskless compress stores. The article documents the experimental workflow with tools like likwid-bench, perf-stat, and IBS, and highlights the substantial speedups achievable with careful SIMD implementation. It also surveys future directions and related SIMD libraries for portability.