Re: [TUHS] Lorinda Cherry

[Derek Fawcus <dfawcus+lists-tuhs@employees.org>]

On Thu, Feb 17, 2022 at 01:44:07PM -0800, Bakul Shah wrote:
> MacOS (m1 pro, prob. 2Ghz)
> $ command time dc <<< '2p3p[dl!d2+s!%0=@l!l^!<#]s#[s/0ds^]s@[p]s&[ddvs^3s!l#x0<&2+l.x]ds.x' > xxx
> time: command terminated abnormally
>         1.00 real         0.98 user         0.01 sys
> [2]    37135 segmentation fault  command time dc <<<  > xxx
> $ wc xxx
>     7342    7342   42626 xxx
> $ size `which dc`
> __TEXT	__DATA	__OBJC	others	dec	hex
> 32768	16384	0	4295016448	4295065600	100018000

So macOS has got worse, or the systems have:

$ sysctl machdep.cpu.brand_string
machdep.cpu.brand_string: Intel(R) Core(TM)2 Duo CPU     U9400  @ 1.40GHz
$ uname -a
Darwin Old-MBA.local 15.6.0 Darwin Kernel Version 15.6.0: Thu Jun 21 20:07:40 PDT 2018; root:xnu-3248.73.11~1/RELEASE_X86_64 x86_64
Old-MBA:~ derek$ time dc <<< '2p3p[dl!d2+s!%0=@l!l^!<#]s#[s/0ds^]s@[p]s&[ddvs^3s!l#x0<&2+l.x]ds.x' > xxx
Segmentation fault: 11

real	0m14.982s
user	0m12.608s
sys	0m0.206s
$ wc xxx
    7868    7868   45782 xxx

My old machine computed more primes before the program crashed!
Given the comment about the GNU s/w running out of stack, I guess the x86 version uses smaller stack frames.

DF