[Example] Is gpuArray-single available as a data cast?

[diegozanon]

Describe the example
The MATLAB doc says in this example that it you would give a 10x performance improvement if data is cast using "gpuArray-single", which uses MATLAB Parallel Computing Toolbox.

Is "gpuArray-single" supported and offers any improvement in this Python port?

option_factory() (from simulation_options) says that "gpuArray-single" is a valid data_cast, but simulation fails because post_init() (also from simulation_options) doesn't accept "gpuArray-single" as a valid parameter.

If it is supported, it would be nice to modify the example to show how.

Sources
Source: this example
Target: this example

Additional context
None. Just thanks for your hard-work!

[waltsims]

Closing as obsolete. The MATLAB-style data_cast='gpuArray-single' no longer exists in the Python API. GPU execution is selected via device='gpu' on kspaceFirstOrder(), and precision is controlled via the dtype parameter being introduced in #716 (currently only float64/float32 are supported in the Python backend). The C++ backend has fixed internal precision regardless of dtype.