I'm trying to compare the size of some files in Python os.path.getsize(path) It's different from comparing it with this function f = open("~~~.txt", 'r') Would it be faster to read it and count it until the eof comes out on the loop door? I just think it's faster to use os.path.getsize, but I don't know exactly how this function works.TT
python file
That's a natural question. It is fastest to use os.path.getsize.
os.path.getsize obtains information by calling os.stat internally.
Among the return values of os.stat, the st_size field is the os.path.getsize value.
https://docs.python.org/ko/3/library/os.html#os.stat
Python includes the builtin function, and the functions of the os module are implemented as c.
The builtin functions, for performance reasons, the os module is an os-related task, so you have to call the os api.
If you are interested in the actual implementation source, look at the posix_do_stat function at the link below.
https://github.com/python/cpython/blob/master/Modules/posixmodule.c
Ultimately, call fstat function GetFileInformationByHandle when *nix is windowed.
If you want a smaller overhead, you can call fstat, GetFileInformationByHandle directly to ctypes.
I don't think it's a good idea to actually read a file just to measure it.
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