HEADS and HEADS-EX Architectures Fitness.

Fitness results for the base HEADS and the HEADS-EX instruction set architectures. The HEADS-EX architecture includes features from all six tested feature groups, including fully associative arguments, six registers, direct-matched labels, split-I/O, directional search instructions, the ifx instruction, and conditional mov-head instructions. Each entry shows the median log population mean fitness in the respective environment, with confidence intervals in parentheses. Bold entries indicate significant (, Wilcoxon rank-sum test) deviations.