In article <20080410.035618.217931997.davem@davemloft.net> (at Thu, 10 Apr 2008 03:56:18 -0700 (PDT)), David Miller <davem@davemloft.net> says:

quoted text
> Branch prediction fares very poorly in such cases, and
> therefore it is better to mispredict one branch over
> all the data items in the same cache line than any one
> of several such branches.  The above new sequence gets
> emitted by the compiler as several integer operations and
> one branch.  As long as all the data items are in the
> same cacheline, this is optimal.

Okay, thanks.

--yoshfuji
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