Got an answer right away. I'll test this tomorrow morning.

-------- Original Message --------
Date:   Tue, 20 May 2014 07:58:10 +0300
From:   Emmanuel Grumbach <[email protected]>

On Tue, May 20, 2014 at 7:19 AM, Pablo Piaggio <[email protected]> wrote:
> [1.] One line summary of the problem:
> 85% decrease performance in iwlwifi from 3.2.0-29-generic to
> 3.15.0-031500rc5-generic

add 11n_disable=8 as a module parameter.
We disabled TX AMPDU by default due to issues users were seeing. If
you are after performance, add this module parameter and you'll get
your performance back.

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https://bugs.launchpad.net/bugs/1319630

Title:
  85% performance hit in iwlwifi from 12.04 to 14.04

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