Re: Pengine - the Prolog engine running SWISH

On Fri, Aug 16, 2013 at 9:48 AM, Jan Wielemaker <[email protected]> wrote:

> On 08/16/2013 04:53 PM, Michael Hendricks wrote:
>
>> That's an intriguing idea.  Our next quarterly roadmap at work requires
>> us to run Prolog in the browser.  We need solutions in well under 100ms,
>> so network latency prevents server-side code.  We had planned to write a
>>
>
> Well, on fairly well connected networks 100ms should be easy.


I wish all our visitors were on well connected networks :-)  90th
percentile load time for a hot cache page on our site is often close to
3,000 ms.  Perhaps 10% of that network latency is under our control,
including protocol changes like SPDY and websockets.


> That is embedding SWI-Prolog in JavaScript if I understand you correctly.
>  If that is possible, it might be a quite nice platform
> for some scripting tasks.  Its not `just open your browser' though ...
>

I spent a couple hours tinkering this morning and have a working version of
BinProlog compiled to 227KB of JavaScript via Emscripten.  That seems
promising.  Some other day, as time permits, I'll try it with SWI-Prolog
too.

It was surprisingly fun to compile a C project into JavaScript and then see
it running in the browser :-)

-- 
Michael
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