Using a ext3 or ext4 file system, assuming that the files have similar checksums, would the following files:
8c87dba9cf4dbc27c0d54083311ffeef6821e8426f5a8d50165d84f5eef80103.npz
1.npz
Take up a different amount of space on the HD? I have many (10 to 100's of thousands) of these files so a difference, however small, would be worth knowing about.
Yes, the longer file name takes up a few more bytes of space in the directory, but a few bytes is insignificant compared to the size of the file, even if the file is only a single 4K block.