GHC 6.8.1 is impressive!

[Bjorn Bringert]

I'd like to third that. The main improvement for GF is that the build  
is 5 times faster, 3 minutes with 6.8.1 instead of 15 minutes with  
6.6.1, using -O2 with both. The compiled program runs 13% faster with  
6.8.1.

Code: http://www.cs.chalmers.se/Cs/Research/Language-technology/darcs/ 
GF/
Machine: 1.83 GHz MacBook, 2 GB RAM, OS X 10.4.10

/Björn

On Nov 9, 2007, at 8:24 , Lennart Augustsson wrote:

> I'd like to second that.  6.8 is quite an improvement.  Well done!
>
>   -- Lennart
>
> On Nov 8, 2007 12:18 PM, Ravi Nanavati <ravi at bluespec.com> wrote:
>> I just finished a running Bluespec's regression suite on a version of
>> our tools compiled with ghc 6.8.1. The results were impressive on two
>> fronts:
>>
>> 1. All of our tests (almost 14,000) had the same behavior as with  
>> ghc 6.6.1
>> 2. Our Haskell code was roughly 33% faster (relative to ghc  
>> 6.6.1). It
>> seems that pointer-tagging made a big difference for our code base
>> (since, if I'm reading the release notes correctly, constructor
>> specialization isn't in yet).
>>
>> We just wanted to take a moment to say that we were pleasantly
>> surprised by ghc 6.8.1 (so much so that we're going to try and use it
>> for released builds sooner than we would have otherwise planned) and
>> to thank everyone involved for the effort they put into it.
>>
>> Thank you,
>>
>>  - Ravi Nanavati (and the rest of Bluespec, Inc.)