[racket] translate from Racket to Common Lisp

At Tue, 6 Nov 2012 07:29:13 -0500, Marc Feeley wrote:
> 
> Le 2012-11-06 à 3:50 AM, Hugh Aguilar <hughaguilar96 at yahoo.com> a écrit :
> 
> > I am very impressed that Racket is as fast as it is. I had expected the 
> compilers such as Gambit to be much faster than the VM-JIT system. If Racket 
> had a 64-bit x86 assembler available, I might even consider using it instead of 
> Gambit.
> > 
> > It's impressive to note the change in relative performance for Racket
> > over past 3 years since you published the benchmarks on the blog --
> > Racket has gone from slower than Gambit on the majority of benchmarks,
> > sometimes by a significant margin, to faster on most of them, and
> > never more than 2x slower (except ctak).
> 
> For your information, it seems that the change in relative
> performance has more to do with the change in C compiler over the
> past 3 years than anything else.

That does not appear to be the case.

I've run the benchmarks on Linux, using both 32-bit and 64-bit builds
(more details below):

 * For 32-bit build, I get results much like the ones I posted earlier,
   suggesting that for this benchmark suite, the choice of gcc versus
   LLVM for Gambit doesn't matter that much.

 * For 64-bit builds (where I'm running 64-bit Gambit for the first
   time), the results are similar to what Brad reported for similar
   benchmarks.

I've also run the old benchmarks on MzScheme v4.2.4 and Racket
v5.3.1.5. The results show that Racket has become mostly faster on
these benchmarks over the last three years.

My goal is not to characterize any implementation as X% better than
another, and we all know the limits of benchmarks. Still, if anyone is
surprised by Racket's performance on these benchmarks, then I would
like to be as clear as possible: Racket's performance is competitive,
and it continues to improve.

----------------------------------------

Machine:
 Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
 Linux 3.0.0-21-generic #35-Ubuntu SMP
 Fri May 25 17:57:41 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

GCC:
 gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)

Gambit:
 v4.6.6, built from source, configured with `--enable-single-host'

Racket:
 v5.3.1.5 built from source, default configuration

MzScheme:
 v4.2.2 built from source, default configuration

Benchmarks:
 For Racket and Gambit:
   At https://github.com/plt/racket
   in collects/tests/racket/benchmarks/common
   commit 891932074c
 For Racket and MzScheme:
   Benchmarks included in PLT Scheme v4.2.4

Results enclosed:
  rg64.html --- Racket and Gambit, 64-bit mode
  rg32.html --- Racket and Gambit, 32-bit mode
  rm64.html --- Racket and MzScheme, 64-bit mode
  rm32.html --- Racket and MzScheme, 32-bit mode
 where times are averages over three runs
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