Re: Guile 2.2 .go files are larger

[Andy Wingo <wingo@igalia.com>]

On Mon 24 Apr 2017 10:24, Andy Wingo <wingo@igalia.com> writes:

> On Sat 22 Apr 2017 15:19, ludo@gnu.org (Ludovic Courtès) writes:
>
>> The closure of Guix built with 2.0 is 193.8 MiB; when built with 2.2,
>> it’s 311.8 MiB.  Guix itself goes from 66 to 150 MiB:
>>
>> $ du -ms /gnu/store/jh07pwbyf5dbpdd5q0nvgagqkgmh76nh-guix-0.12.0-9.25a4/lib/guile/2.2
>> 101	/gnu/store/jh07pwbyf5dbpdd5q0nvgagqkgmh76nh-guix-0.12.0-9.25a4/lib/guile/2.2
>> $ du -ms /gnu/store/rnpz1svz4aw75kibb5qb02hhccy2m4y0-guix-0.12.0-7.aabe/lib/guile/2.0
>> 24	/gnu/store/rnpz1svz4aw75kibb5qb02hhccy2m4y0-guix-0.12.0-7.aabe/lib/guile/2.0
>
> Before we begin, some general notes.  My understanding is that the heap
> usage corresponding to an individual Guix process will be lower, both
                                                                 ^
                              lower than Guix-on-Guile-2.0, I mean

> due to allocation of read-only data in read-only, shareable sections of
> the .go ELF files, allocation of read-write data in packed sections
> known to the GC but not managed by GC, and various optimizations that
> can eliminate or simplify some heap allocations (closure optimization
> among them).  In short my understanding is that Guile 2.2 (and systems
> built on it) should have a smaller run-time footprint than Guile 2.2.

Er, than smaller footprint than Guile 2.0.

Sorry for the confusion :)