[issue40495] compileall: option to hardlink duplicate optimization levels bytecode cache files

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Currently, it's possible to implement this optimization using the Unix command "hardlink". Example:

    hardlink -c -v /usr/lib64/python3.8/__pycache__/*.pyc

On my Fedora 32, this command says:

Directories:           1
Objects:             520
Regular files:       519
Comparisons:         133
Linked:              133
Saved:           2220032

For example, string.cpython-38.pyc and string.cpython-38.opt-1.pyc become hard links.

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