Figure 5:

Execution time of parSMURF¹ and parSMURFⁿ on the synthetic datasets synth_1 (left) and synth_2 (right). The x-axis shows the number of threads for each MPI process; the y-axis, execution time in seconds; experiments are grouped by the number of MPI processes. The black line represents the multi-thread version, while orange, grey, yellow, and light blue show the MPI version with 1, 2, 4, and 8 MPI processes, respectively.