Example of the crazy optimizations that apply here: I once got a 20% speedup in a standard recursive search algorithm by abandoning the native function call sta

Example of the crazy optimizations that apply here: I once got a 20% speedup in a standard recursive search algorithm by abandoning the native function call stack and making my own search-specific stack data structure. Since these algorithms call the same function over and over, making the call stack do minimum work is actually significant.