Tiny tweak in the bit-twiddling: 2% improvement
More of the same: 1% improvement
get rids of chars
Inline backtrack_pillar in backtrack: 4% speedup
Small refactoring
More small refactoring
whitespace improvement
Fix a bug where not the right projection was restored. bug introduced by the tweak to the skipping ahead that gave a (then) surprising speed-up
Replace R_BEST by R_MIN/R_MAX