importreimporttimeitfromtypingimportList,Dict,Any,Uniondefold_format_annotation(annotation):ifgetattr(annotation,"__module__",None)=="typing":defrepl(match):text=match.group()returntext.removeprefix("typing.")returnre.sub(r"[\w\.]+",repl,repr(annotation))returnrepr(annotation)defnew_format_annotation(annotation):ifgetattr(annotation,"__module__",None)=="typing":return (repr(annotation)                .replace(".typing.","@TYPING@")                .replace("typing.","")                .replace("@TYPING@",".typing."))returnrepr(annotation)old_time=timeit.timeit(lambda:old_format_annotation(Union[List[str],Dict[str,Any]]),number=100_000)new_time=timeit.timeit(lambda:new_format_annotation(Union[List[str],Dict[str,Any]]),number=100_000)print(f"Old version (re.sub):{old_time:.6f}s")print(f"New version (.replace()):{new_time:.6f}s")print(f"Difference:{old_time/new_time:.2f}x")

$ ./python -B inspect_bench.pyOld version (re.sub): 2.043900sNew version (.replace()): 1.175867sDifference: 1.74x