Create a fast simulation data structure, with all necessary arrays, and components ordered for evaluation. This function also creates the reducer functions for each component similar to the reducer builder in Builder, but with inputs and outputs using the FastSimulation mutable arrays

Calculates the size in bytes / clock step of the simulation arrays bigint arrayshave very uncertain size, so an estimate of 16 bytes is assumed. this should be revisited for more accuracy

True if all conditions are fulfiled for the component to be in the next batch to be reduced. Used when ordering components.

Check all the active FastComponents to ensure everything is valid Use data from initialisation to write any not-yet-written component output widths

True if the component is combinational

print function for debugging

Re-evaluates the combinational logic for the given timestep - used if a combinational input has changed

Run an existing fast simulation up to the given number of steps. This function will mutate the write-once data arrays of simulation data and only simulate the new steps needed, so it may return immediately doing no work. If the simulation data arrays are not large enough they are extended up to a limit. After that, they act as a circular buffer. TimeOut if not None is the cutoff time after which the simulation terminates execution unfinished. Use fs.ClockTick to determine whether simulation has completed. returns speed, in clock cycles per ms, or None if complete