Evolution over time of multiple key parameters linked to the gas-to-star mass conversion. The top panel shows the time evolution of the mass of gas converted in sinks and stars in ECF1. The formation of massive stars is represented by vertical lines, with their colour indicating the mass of the massive object. The bottom panels show the temporal evolution of the accretion rate (left), mass median (centre), and the number of stars and sinks formed in the simulation (right). For the first two panels, the quartile range (grey zone) and the maximum value (dashed line) are also shown. It allows us to see that the sharp transition at 4Myr occurs on the majority of sinks. However, even after the change of regime, the cloud is still capable of producing some massive sinks with a high accretion rate.