Streaming simulation results

[pepijndevos]

I thought I'd request some input before embarking on a large mission.

It seems valuable that if you're running a long and slow simulation that you could perform streaming analysis and terminate early if the circuit doesn't meet the requirements.

It seems that ngspice shared already exposes a send_data method that will receive streaming data, but this isn't hooked up anywhere in a nice high-level interface.

I think there are a few concerns to do this well:

• send_data can incur quite some overhead so you wouldn't want to enable it by default
• adding a dependency on something like streamz for such a niche feature might be undesirable
• a streaming API might look quite different from a batch API

Maybe you'd want to introduce an ngspice-streaming key to CircuitSimulator that activates a NgSpiceShared subclass with send_data implemented.

I'm still a bit lost in the plumbing between CircuitSimulator and NgSpiceShared to understand how a streaming API should be implemented. My feeling is the .run(); .plot().to_analysis() path isn't really compatible with streaming.

For reference, this is how it is implemented in my bespoke simserver api https://github.com/NyanCAD/Pyttoresque/blob/main/pyttoresque/simserver.py

[tapegoji]

I did this using pause and resume command. I am open for e better approach. Lets discuss this. I guess ngspice developer will be open for collaboration too