[m-users.] users Digest, Vol 107, Issue 14

[Michel Vanden Bossche]

> On 16 Oct 2023, at 16:07, Volker Wysk <post at volker-wysk.de> wrote:
> 
> Am Montag, dem 16.10.2023 um 15:39 +0200 schrieb Michel Vanden Bossche:
>>> On Sat, 14 Oct 2023, Matthew Delaney wrote:
>>> 
>>>> Hi, I'm new to Mercury but am interested in using it to replace Prolog
>>>> in a project I'm just starting. This project will need a web-interface
>>>> and backend DB connectivity. Reading through Mercury's documentation,
>>>> it looks like the most straightforward approach would be to use CGI
>>>> for the Web App part and the Foreign Language Interface for DB
>>>> connectivity. Is that correct or are there other options available?
>>> 
>>> If you're using one of the Java or .NET web frameworks, you can compile
>>> your Mercury to a Java or C# library respectively and call it from the
>>> framework.
>>> 
>>> Julien.
>> 
>> Our experience with the Java backend is that it offers great performance.
>> A Mercury application complied to Java is viewed from the outside as a
>> standard Java application (Spring Boot…) and can be easily deployed in the
>> cloud, using Kubernetes for scalability. Just in case…
> 
> I've programmed in Java many years ago. And I think that the asm_fast grade
> must be WAY faster than Java. I have two time critical Mercury projects and
> the performance is astonishing.

Yes, of course, outstanding, but you would be surprised by the performance with Java, with the additional benefit of having the possibility to use all the Java ecosystem. In the paper attached (section 7 Benchmark), you see that the performance “penalty” for using Java is a factor 2.5, quite reasonable. This was done in 2010 and should be redone (NB - The link to the demo cloud.missioncriticalit.com/rule-demo <http://cloud.missioncriticalit.com/rule-demo> is unfortunately not active anymore).

Michel

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