| Package | “optimize” Flag Description | 
|---|---|
| dev-lang/moarvm | Enable optimization via CFLAGS | 
| games-board/stockfish | Enable upstream -O3 optimizations (default enabled) | 
| net-misc/sks | Enables bytecode optimization | 
| sci-libs/opencascade | Don't clear allocated memory. Use optimized memory manager unlesstbb USE flag is set. |