No "last core parallel slowdown" on OS X

Dave Bayer bayer at
Sat Apr 18 20:05:34 EDT 2009

Yikes! You're right. I never noticed, but I never had an 8 GB Mac  

I looked at ./configure for the GHC 6.10.2 source, and realized there  
was already something there. I tried

./configure --build=x86_64-apple-darwin

and it didn't work. However, it did give me something to Google,  
leading me to

Ticket #2965 (new feature request)
GHC on OS X does not compile 64-bit

Apparently this isn't a one-liner. Once my semester ends, I'll see if  
I can help.

I've got to wonder if it would be less work to sneak a gift Mac Pro  
past Microsoft security, and just wait? ;-)

The GHC team has been busting their humps on parallel code lately, and  
OS X does so much better... They should stop having to apologize in  
papers for the poor parallel performance of Linux itself. A decked-out  
Mac Pro should be the flagship platform for 64 bit, parallel GHC.

On Apr 18, 2009, at 1:46 PM, Daniel Peebles wrote:

> That looks great! I wonder what about Mac OS leads to such good  
> performance...
> Now if only we could get a nice x86_64-producing GHC for Mac OS too, I
> could use all my RAM and the extra registers my Mac Pro gives me :)

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