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    SubjectRe: [RFC PATCH v2] bridge: make it possible for packets to traverse the bridge without hitting netfilter
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    From: Imre Palik <imrep.amz@gmail.com>
    Date: Fri, 06 Mar 2015 11:34:29 +0100

    > Removed those pieces of the packet pipeline that I don't necessarily
    > need one-by-one. Then measured their effect on small packet
    > performance.
    >
    > This was the only part that produced considerable effect.
    >
    > The pure speculation was about why the effect is more than 15%
    > increase in packet throughput, although the code path avoided
    > contains way less code than 15% of the packet pipeline. It seems,
    > Felix Fietkau profiled similar changes, and found my guess well
    > founded.

    Yes and that's the part being left out, the "why".

    That's part of what I expect in the justification.

    Look, we're not doing things this way. We need to find a clean
    and generic way to make the netfilter hooks as cheap as possible
    when netfilter rules are not in use.


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