ONIG_OPTIMIZE_MAP 4937 regcomp.c        reg->optimize   = ONIG_OPTIMIZE_MAP;
ONIG_OPTIMIZE_MAP 5153 regcomp.c        else if (reg->optimize & ONIG_OPTIMIZE_MAP) {
ONIG_OPTIMIZE_MAP 3172 regexec.c        case ONIG_OPTIMIZE_MAP:
ONIG_OPTIMIZE_MAP 3302 regexec.c        case ONIG_OPTIMIZE_MAP: