Re: ANN: Dogelog Player 2.1.6 (Assertion Sharing)

Hi,

Dogelog Player is a Prolog system for the
JavaScript, Python and Java target that borrows
much of its design from formerly Jekejeke Prolog.
While Dogelog Player shipped only with first
argument indexing for almost 4 years, we now added
multi-argument just-in-time indexing.

For programs one sees fewer spurious choice
points. For the dynamic database, in queries
one sees a speed-up of almost a factor M, where
M is the size of the index map. For updates the
speed-up materializes less, due to the overhead
of our 100% Prolog written insert operations.

Bye

See also:

Just-in-Time Indexing in Dogelog Player
https://medium.com/2989/69200b90ccec

Mild Shock schrieb:
> Dear All,
> 
> We are happy to announce a new edition
> of the Dogelog Player:
> 
> - Enhanced core (0rNaN):
> Special values are numbers, but neither
> integer nor float. We introduced a further
> special value, namely 0rNaN which stands
> for not a number. Unlike the IEEE proposal,
> we didn't extend arithmetic comparisons such
> as max/3, (<)/2, etc... Only parsing/unparsing
> and foreign function interface (FFI)
> support was introduced.
> 
> - Precomputed Hashes:
> Java programmers are familiar with the
> hashCode() contract and with the programming
> pattern of a cached hash. We went a step further
> and gave the already existing frozen compounds
> of Dogelog player an additional precomputed
> .hash field. With amazing speed-up for built-ins
> such as term_hash/2, (==)/2, etc..
> 
> - Assertion Sharing:
> Precomputed hashes shine when combined with
> NO-COPY mechanisms in the dynamic database,
> notoriously difficult for WAM machines but
> easy for Heap based Prolog systems such as
> Dogelog Player. So far we provided only
> program sharing (PS), this release also
> features assertion sharing (AS).
> 
> Have Fun!
> 
> Jan Burse, https://www.herbrand.ai/ , 20.03.2026