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Parallel π-WAM: JavaScript Workers as CPU Backend (Was: Parallel π-WAM: 1.7 Giga Lips on a CPU)

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Hi,

We recently implemented a parallel π-WAM on
a CPU backend and could demonstrate an
estimated 1.7 Giga Lips. This CPU backend
was written in Java, uses Java platform
threads and is meanwhile part of library(edge/
brainfog). In the following we report first
porting steps to JavaScript.

With the adoption of JavaScript workers we
embrace preemptive multithreading, even
for a Web Prolog, and depart from Dogelog
Players cooperative multitasking. The design
also adopts SharedArrayBuffer to replicate
the Java heap, that is shared among
Java platform threads.

Bye

See also:

Parallel π-WAM: JavaScript Workers as CPU Backend
https://medium.com/2989/5ef903e5e785

Mild Shock schrieb:
> Hi,
> 
> We recently implemented a parallel π-WAM
> on a GPU backend and could demonstrate an
> estimated 11.4 Giga Lips. In this post we
> report a further experiment, this time
> presenting a parallel π-WAM on a CPU backend,
> that can lift specialized Prolog, currently
> to 1.7 Giga Lips performance.
> 
> Having an excess number of threads is a
> bad idea. What if we do context switching
> on our own? With this approach we could
> bring down the execution time of 128 Hack
> VMs by 33%. We estimate for the test which
> had 11.4 GLips on the GPU, that we reach
> 1.7 GLips on the CPU.
> 
> Bye
> 
> See also:
> 
> Parallel π-WAM: 1.7 Giga Lips on a CPU
> https://medium.com/2989/8a984e75af44

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ANN: Dogelog Player 2.2.3 (Introducing π-WAM) Mild Shock <janburse@fastmail.fm> - 2026-07-07 19:26 +0200
  Dogelog Player: 11.4 Giga Lips with a Budget Laptop (Re: ANN: Dogelog Player 2.2.3 (Introducing π-WAM)) Mild Shock <janburse@fastmail.fm> - 2026-07-08 18:39 +0200
    Parallel π-WAM: 1.7 Giga Lips on a CPU (Was: Dogelog Player: 11.4 Giga Lips with a Budget Laptop) Mild Shock <janburse@fastmail.fm> - 2026-07-15 18:08 +0200
      Parallel π-WAM: JavaScript Workers as CPU Backend (Was: Parallel π-WAM: 1.7 Giga Lips on a CPU) Mild Shock <janburse@fastmail.fm> - 2026-07-20 18:50 +0200
        Parallel π-WAM: An Interleaved Synchronous Emulator (Re: Parallel π-WAM: JavaScript Workers as CPU Backend) Mild Shock <janburse@fastmail.fm> - 2026-07-25 03:51 +0200

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