From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marex@denx.de>
Date: Fri, 23 Aug 2013 05:05:42 +0200
Subject: [U-Boot] [U-Boot,
	1/2] common: Add CCACHE variable to allow use of ccache
In-Reply-To: <5216A742.8000006@freescale.com>
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	<201308222136.35372.marex@denx.de> <5216A742.8000006@freescale.com>
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Dear York Sun,

> On 08/22/2013 12:36 PM, Marek Vasut wrote:
> > There is an env variable to configure separate ccache cache dir , so just
> > by setting that. But then , when each build ends, you would need to
> > clean it up somehow. It was mentioned in the discussion with the patch.
> > You can try working on this some more and post a patch, then we can talk
> > about further forging of this.
> 
> I fixed the 2nd patch and I am running MAKEALL with individual board
> folder for ccache. The compiling time for the first run on my laptop is
> 56 minutes. The 2nd run is 23 minutes. About the same improvement if
> using a big unified cache for all boards. By the way, each board cache
> is about 7~8MB.
> 
> You set my expectation high. I was hoping to get 10x or more improvement.

It should be more, try checking if there is no bottleneck.

Best regards,
Marek Vasut