Improve run_state.rs performance

[andrewdavidmackenzie]

Missing struct capabilities in order to avoid looping over long lists of structs

// - track the states a function is in, without looking at all queues

// - get_input_blockers has to iterate through functions to find senders to a function:IO pair

// - unblock_flows iterates over functions to see if in the flow unblocked

// - block_exists() iterates over blocks to see if function is blocked

// - get blocks using the blocked function id (get_output_blockers()) - make blocks a HashMap? // - remove_blocks iterates over all blocks with the filter, look at both filters to see what is // actually needed // let internal_senders_filter = |block: &Block| // (block.blocking_flow_id == block.blocked_flow_id) & // (block.blocking_function_id == blocker_function_id); // let all = |block: &Block| block.blocking_function_id == blocker_function_id;