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From: Mild Shock <janburse@fastmail.fm>
Newsgroups: comp.lang.prolog
Subject: Re: ANN: Dogelog Player 1.2.3 (Time Conversion)
Date: Sat, 2 Nov 2024 13:59:13 +0100
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Dogelog Player is a Prolog system written 100% in
Prolog itself. It features a library(aggregate), the
bread and butter of statistics. Unfortunately it
inherits some defects from its ancestors. We show
its bad performance in a Million Rows Challenge
and offer an alternative.

When calling the predicate sample/2 it will give
us values X1, .., Xn. And from this we can recompute
the mean and the standard deviation. We could get
rid of the horrendous memory footprint and gain
speed, in that we used an aggregate/3 bootstrapped
from a new library(util/hash).

See also:

Million Rows Challenge in Dogelog Player
https://twitter.com/dogelogch/status/1852601455544275090

Million Rows Challenge in Dogelog Player
https://www.facebook.com/groups/dogelog

Mild Shock schrieb:
> Dear All,
> 
> We are happy to announce a new edition of the Dogelog player:
> 
> - New atom_time/4:
>    The predicate sys_time_atom/3 is now officially
> called atom_time/3.  The underlying strftime() and
> strptime() routines can represent more than just
> local time.  We therefore introduced atom_time/4
> with an options list.
> 
> - Improved open/4:
>    The open/4 predicate and its HTTP client functionality
> was removed from library(util/spin) and moved to
> the core. In addition, open/4 can now return options
> such as the final URL via uri/1 and the received
> headers via fields/1.
> 
> - New http_server_close/1:
>    The HTTP server in library(util/spin) has undergone
> some extensions.  The asynchronous processing has been
> improved, so that HTTP server set-up, HTTP client round
> trip and HTTP server tear-down can be implemented in
> the same application despite being single threaded.
> 
> Have Fun!
> Jan Burse, 03.10.2024, https://www.xlog.ch/