Rewrite the isspam.c program to use memory-mapped files, a compact trie data structure for forbidden word lookup, and pthread-based parallel processing across up to 16 threads. Remove the old fixed-size buffer and linear forbidden word array in favor of a SIMD-accelerated scanning approach with AVX2 instructions. Update the Makefile to enable aggressive x86-64 optimization flags including -march=native, -flto, -ffast-math, and -mavx2 for maximum performance on supported hardware.
retoor
d86aab450c