Re: Time to drop the pre-dump phase in the build?

[Daniel Colascione <dancol@dancol.org>]

On 01/10/2014 02:58 PM, David Kastrup wrote:
> Daniel Colascione <dancol@dancol.org> writes:
>
>> On 01/10/2014 11:15 AM, Eric S. Raymond wrote:
>>
>>> (4) We're presently buying some startup speed at the cost of a larger
>>>       minimum working set.
>>
>> The minimum working set is zero. Modern operating systems demand-page
>> necessary information.
>
> That's a popular misconception.  The key point to note is "page" in
> demand-paging.  Unless one uses a garbage collection and topological
> sort and compaction of the memory, most of the stuff that will get paged
> in along with required data will not get accessed because it is
> unrelated.  Now a temacs dump has not seen much action with regard to
> fragmentation, but still the normal Lisp programming styles allocate and
> release enough transient memory that the image will be mixed up quite
> more than byte-compiled files will be.  Of course, if the byte-compiled
> files are small, you'll get into block waste as well.

~/edev/trunk/src
$ ps -eo pid,rss,cmd | grep '[e]macs'
31132 38516 ./temacs -Q
31136 31312 ./emacs -Q

[For emacs]
Address           Kbytes     RSS   Dirty Mode   Mapping
0000000000827000   11320   10552    8020 rw---  emacs