C Compilers Still Can't Do SIMD
A deep dive into why modern C/C++ compilers still struggle with SIMD optimizations, and why projects like ffmpeg continue to use hand-written assembly for performance-critical code. Includes real-world benchmarks showing 2x performance differences between SIMD and non-SIMD code, and explores the surprising fragility of compiler optimizations.
Performance
SIMD
Compilers
Assembly