Re: [PATCH v3 0/3] automatically skip away from broken commits

From: H. Peter Anvin <hpa@zytor.com>
Date: Jun 15, 2009, 13:16 UTC
Message-ID: <4A364995.2010703@zytor.com>
In-Reply-To: <c07716ae0906150059m7f9706x6f9022afde15d3b0@mail.gmail.com>

Christian Couder wrote:

> Yes, but I feared that there could be rounding related differences
> between platforms.

Doesn't matter for this application. Really. Anything you're going to do yourself will be much worse. Realistically, you might have a difference in the 53rd bit.

> By the way, could you explain why power 1.5 is better than 2? It would
> be much simpler if we could avoid square rooting anything in the first
> place.

It is the power function that most closely creates a distribution which matches the value curve (rounded to a small fraction.)

Show 6 quoted lines

> I don't think this is a real problem for this application. In fact I
> think it's already quite overkill and there are better things to do,
> like looking for a commit on a different branch among the first ones
> in the list, if we want to improve the current behavior.
> 
> So unless there is a real flaw, I am going to work on something else.

Makes sense.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.