Disable GA parallelism

[keegit]

I'm currently implementing a genetic algorithm that runs a circuit simulation to evaluate a circuits fitness. To perform the simulation, I use a third party C API. This API is called from within the fitness_of() function of the FitnessFunction trait I defined.

The third party C API I use cannot be used in a multi-threaded fashion. so I'm wondering if it's possible to disable the parallelism in the ga module; or if there is a less performant, sequential version of genevo.

[haraldmaida]

since Version 0.7 of genevo it should be easy to disable parallel execution. In fact it is already disabled for wasm targets due to issues on that platform. I will expose a feature flag. In the meantime you could try to disable it in a fork of genevo. In Cargo.toml

replace:

[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
rayon = "1"

with:

[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
rayon = {version = "1", optional = true }

I'm currently not at my home computer to test it. So I'm not sure if this really works.

[keegit]

Yeah that didn't work. I'm going to modify my fork a little bit, and I'll submit a pull request.

[keegit]

I ended up just removing the rayon dep from my fork altogether, I didn't have time to try and figure out a clean way to disable parallelism.

[christopinka]

@haraldmaida is there a feature flag available for this yet? Issue was closed? Thanks