// Start all comms in parallel, and wait for their completion in one shot
std::vector<simgrid::s4u::CommPtr> comms;
for (int i = 0; i < flow_amount; i++)
// Start all comms in parallel, and wait for their completion in one shot
std::vector<simgrid::s4u::CommPtr> comms;
for (int i = 0; i < flow_amount; i++)