49                 rx=None, quiet=0, legacy=False, optimize=-1, workers=1,  argument
64     optimize:  int or list of optimization levels or -1 for level of
113                                            optimize=optimize,
125                                 legacy, optimize, invalidation_mode,
133                  legacy=False, optimize=-1,  argument
147     optimize:  int or list of optimization levels or -1 for level of
190     if isinstance(optimize, int):
191         optimize = [optimize]
195     optimize = sorted(set(optimize))
197     if hardlink_dupes and len(optimize) < 2:
213         for opt_level in optimize:
245                 for index, opt_level in enumerate(optimize):
248                                             optimize=opt_level,
251                         previous_cfile = opt_cfiles[optimize[index - 1]]
282                  legacy=False, optimize=-1,  argument
293     optimize: as for compile_dir() (default -1)
309                 optimize=optimize,
441                                         optimize=args.opt_levels,
452                                        optimize=args.opt_levels,