Re: [PATCH v2 2/9] rbtree: optimize fetching of sibling node

[Rik van Riel]

On 08/02/2012 06:34 PM, Michel Lespinasse wrote:
> When looking to fetch a node's sibling, we went through a sequence of:
> - check if node is the parent's left child
> - if it is, then fetch the parent's right child
>
> This can be replaced with:
> - fetch the parent's right child as an assumed sibling
> - check that node is NOT the fetched child
>
> This avoids fetching the parent's left child when node is actually
> that child. Saves a bit on code size, though it doesn't seem to make
> a large difference in speed.
>
> Signed-off-by: Michel Lespinasse<walken@xxxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxx>


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