OpenSCAD

OpenSCAD Performance

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thastark

OpenSCAD Performance

I have 64GB RAM, Quad GPU & 12 cores available but OpenSCAD only seems to use max 3GB RAM, No GPU and 10% CPU.

Can anyone point me in the direction of any performance optimizations? I'll compile the code but need a couple pointers to get me started.

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frankv

Re: OpenSCAD Performance

Openscad does not multi-thread, so will only use 1 core.

I suspect that it would be a big job to convert to multi-threading, just because otherwise it would have been done long ago. Even the relatively simple step of running a separate UI thread hasn't been done.

Frank

On 8/02/2018 10:50 AM, "Matt Stark" <[hidden email]> wrote:

I have 64GB RAM, Quad GPU & 12 cores available but OpenSCAD only seems to use max 3GB RAM, No GPU and 10% CPU.

Can anyone point me in the direction of any performance optimizations? I'll compile the code but need a couple pointers to get me started.

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kintel

Re: OpenSCAD Performance

Administrator

OpenSCAD runs rendering in a separate thread from the UI thread.

Turning the rendering into a multi-threaded version is work in progress and could need more eyes: https://github.com/openscad/openscad/pull/1980

Note: This will only split the application of individual (e.g. boolean) operators out into separate threads, not make the operations themselves multi-threaded. The rather non-obvious effect of this is that the maximum speedup tends to be capped at ~35% since the last union operation will still take half of the time and run single-threaded.

-Marius

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NateTG

Re: OpenSCAD Performance

Maybe this is more of a question for github, but what about making the
interpreter multi-threaded? Immutable variables are supposed to make that
easier.

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thastark

Re: OpenSCAD Performance

Thanks all.

I get parallel processing would be akin to a rewrite. I was interested in
understanding if there are any configurable bottlenecks. I'll run over to
github & see what's going on there. Love the community & love the tool.
Really appreciate the feedback!

Cheers -

Matt

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