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bug#29921: O(n^2) performance of rm -r
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From: |
Niklas Hambüchen |
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Subject: |
bug#29921: O(n^2) performance of rm -r |
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Date: |
Mon, 1 Jan 2018 20:12:56 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Thunderbird/58.0 |
Just to be clear:
What I'm reporting here is a suspected regression.
The patch I linked, merged into coreutils in 2008, claims to fix the
exact problem I'm having.
The author measured time with `date` (see patch contents) which measures
wall time. So I believe that the statement of the patch is that it
improved `real` time from O(n²) to O(n).
I observe that in the current version of rm, `real` time is O(n²).
This is why I think this is a regression: The intended improvement of
the patch is no longer in effect.