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Re: [PATCH] Use a hash rather than a linked-list for cycle check in cp
From: |
James Youngman |
Subject: |
Re: [PATCH] Use a hash rather than a linked-list for cycle check in cp |
Date: |
Tue, 22 Apr 2008 19:38:45 +0100 |
On Wed, Apr 16, 2008 at 10:34 PM, Bo Borgerson <address@hidden> wrote:
> The performance benefit is there, but on my machine with a PATH_MAX of
> 4096 it's hard to see, because the userland work `cp' does is dwarfed
> by the work the kernel does on its behalf:
Many platforms allow you to create a directory tree whose
fully-specified components are much longer than PATH_MAX, as long as
you don't try to create/delete/traverse them by their fully-qualified
name. This included Linux and HP-UX when I tried it (in about
1995, so things may have changed).
James.