Determinism and reproducibility of data flow

A method comprising:

• executing a first task over one or more first execution iterations to generate one or more first data iterations of first data, wherein at least one individual first timestamp respectively corresponds to at least one first data iteration of the one or more first data iterations, the at least one individual first timestamp corresponding to a first clock corresponding to the first task;
• and
• executing a second task to generate one or more second data iterations based at least on the at least one first data iteration, the second task obtaining the at least one individual first timestamp corresponding to the at least one first data iteration and selecting the at least one first data iteration for use based at least on the corresponding at least one first timestamp by comparing the at least one individual first timestamp to a second time associated with the second task, a second clock corresponding to the second task keeping track of the second time.