[OpenIndiana-discuss] Questions about /var/pkg

[Andreas Wacknitz]

Am 14.01.24 um 00:36 schrieb Bill Sommerfeld via openindiana-discuss:
> On 1/13/24 15:20, Andreas Wacknitz via openindiana-discuss wrote:
>> Am 14.01.24 um 00:13 schrieb Goetz T. Fischer:
>>> i'm afraid making ips fast needs more than just a cython module here
>>> and there.
>>> don't get me wrong, that's not indiana's fault but a genernal ips
>>> issue. maybe having a closer look at
>>> mr. Wegmueller's go version would be a good idea after all.
>> If you want to make IPS fast you will probably need more than switching
>> the implementation language.
>> As Aurélien mentioned, IPS is using a SAT solver. So it might be
>> necessary to also change the algorithms.
>> Are you sure that you can devote enough time to achieve real advantages?
>
> Any such effort should start by profiling to see where the time
> actually goes - don't assume the SAT solver is eating it all.  My
> casual pokes at it showed a lot of time going into manipulating the
> on-disk metadata, with a lot of short write() syscalls instead of
> using buffered I/O - but that may not have been a representative
> sampling of where the time goes.
>
You are confirming what I wrote about the need to change algorithms. The
SAT solver was just an example. Alas changing this doesn't seem to be so
easy without changing IPS requirements.

Andreas