Re: gnulib-tool.py: Update TODO file

[Collin Funk]

On 3/23/24 5:01 PM, Bruno Haible wrote:
> * Is os.walk() as efficient as the 'find' command? On some file systems,
>   determining the type (file vs. directory) of a directory entry requires
>   an extra stat() call; on others, it is no extra overhead. We can assume
>   that the 'find' command is well optimized.
>   The os.walk documentation says: "Changed in version 3.5: This function
>   now calls os.scandir() instead of os.listdir(), making it faster by
>   reducing the number of calls to os.stat()."
>   Does it mean that os.walk is as fully optimized as the 'find' command?
>   I can't tell without looking into the Python sources or making actual
>   measurements.

Interesting. I wasn't considering that many factors. The comment is
nearly a decade old so I assumed that Python 2 / early Python 3 had an
excessively slow implementation.

> * There is only 1 'find' invocation per gnulib-tool invocation. It does
>   not occur in a loop. Therefore it is not necessarily worth optimizing.
> 
>   Whereas the 'sed' invocation in GLFileSystem.py:382 is run in a loop.

Yes that makes sense.

Collin