If you have a file with say a hundred functions, and each function contains the full path of that file on disk, your pyc file will contain about (100*(path_size+overhead)) bytes. In some cases, this is pretty significant.
Benjamin Peterson <benjamin@python.org> added the comment:
How exactly does it bring down your disk space?
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nosy: +benjamin.peterson
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Python tracker <report@bugs.python.org>
<http://bugs.python.org/issue12190>
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