Re: Pi program and hard disk usage
- From: user923005 <dcorbit@xxxxxxxxx>
- Date: Thu, 27 Sep 2007 11:50:55 -0700
On Sep 27, 12:14 am, mike3 <mike4...@xxxxxxxxx> wrote:
On Sep 24, 12:57 pm, user923005 <dcor...@xxxxxxxxx> wrote:
On Sep 22, 4:45 pm,mike3<mike4...@xxxxxxxxx> wrote:<snip>
I think Mr. Harter's (IIRC) suggestion is going to be pretty near to
optimal. You might improve it a bit with LRU cacheing or something,
but no matter what you do you will be waiting on the disk. I think
that also is plainly obvious.
However there must, must be some way that those really fast
pi programs like PiFast, QuickPi, etc. manage to do huge runs
that are too big to fit in RAM so fast. How do they do it? Any
ideas?
I guess that they figured out a way to do it so everything they
operate on fits in RAM.
If you use disk, you slow down by a factor of 300,000. Since they
don't seem horribly slow, we can assume that they are not using disk
for RAM.
Maybe you have more temporary variables than they do.
.
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