On May 13, 2:37 pm, mark mcclure <mcmcc...@unca.edu> wrote:
> On May 12, 3:27 am, mabshoff <mabsh...@googlemail.com> wrote:
Hi,
> > I have build a 3.4.2 binary with various fixes and posted it at
> > http://sage.math.washington.edu/home/mabshoff/OSX64/
> > Please give it a spin if you care about 64 bit OSX.
>
> Seems to work OK on my Mac Pro, although I hardly put it to
> the test. Are there any specific commands that you would want
> me to try or that I might expect to run faster on the 64 bit
> version? Perhaps some operations with large matrices?
It depends, some benchmarks are faster (things depending on MPIR),
some are slower, i.e. certain operations with LinBox IIRC.
> I notice the following when I check the precision of double:
> sage: RDF.prec()
> 53
>
> This is the same result I get when I execute this command on
> my 32 bit version. I expected this, since I've noticed the same
> behavior in 64 bit Mathematica, Matlab, and C, but it makes me
> wonder why we should be excited about 64 bit systems.
Doubles are the same everywhere. The main issue is that you now can
address more than 2 or 4GB RAM and given that you can get a mac with
loads of RAM theses days it seems prudent to go 64 bit. Just like on
Windows an aweful lot of software is still 32 bit even on 64 bit
systems. Exceptions are mostly things like databases and scientific
applications, i.e. those who need the extra RAM.
As usual the port uncovered a number of bugs in Sage, so this is a
good thing that it now works.
> Mark McClure
Cheers,
Michael
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