On Thu, Jun 25, 2015 at 10:26:53PM +0200, Peter Bex wrote: > On Thu, Jun 25, 2015 at 05:04:17PM -0300, Stephen Eilert wrote: > > Not sure about the status of this particular GSOC, but SBCL could also be > > "cheating". > > > > http://www.sbcl.org/gsoc2013/ideas/#sec-1.2 > > > > Now, I thought GMP were GPL'd and SBCL not, so I'm unsure about the legal > > implications, if it does bundle GMP now. > > Thanks for posting that; I hadn't looked at the sbcl implementation > of the pi-digits benchmark, but indeed that page says "Pi digits on > the benchmarks game is currently a bunch of calls to GMP". This would > *really* be cheating in my opinion, as it's not testing the language > implementation but using nonstandard extensions that replace stuff > that's already part of the core. > > I had just assumed it would be using the sbcl native implementation > (which indeed is pretty damn good and almost 100% pure Lisp code).
In fact, there are two implementations, one of which uses native operations. It is still faster than CHICKEN and very close to Guile/GMP: http://benchmarksgame.alioth.debian.org/u32/program.php?test=pidigits&lang=sbcl&id=2#log It does use some type annotations, though. Adding some to the CHICKEN version makes it go a tiny bit faster, but not by much. Cheers, Peter
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