add results comm times for gatherbcast on 1 process

results/comm_times/cost_opti_gatherbcast_1np.txt

+679.03
+900.94
+901.76
+901.76
+949.79
+949.79
+949.79
+949.79
+949.79
+949.79

results/comm_times/gatherbcast_1np

+At iteration 0 on process 0 the update of tau takes 0.03734993934631348 s.
+--------------------------
+At iteration 1 on process 0 the update of tau takes 0.009636640548706055 s.
+--------------------------
+At iteration 2 on process 0 the update of tau takes 0.00824117660522461 s.
+--------------------------
+At iteration 3 on process 0 the update of tau takes 0.007983207702636719 s.
+--------------------------
+At iteration 4 on process 0 the update of tau takes 0.006699800491333008 s.
+--------------------------
+At iteration 5 on process 0 the update of tau takes 0.015251636505126953 s.
+--------------------------
+At iteration 6 on process 0 the update of tau takes 0.007268190383911133 s.
+--------------------------
+At iteration 7 on process 0 the update of tau takes 0.007859230041503906 s.
+--------------------------
+At iteration 8 on process 0 the update of tau takes 0.006657600402832031 s.
+--------------------------
+At iteration 9 on process 0 the update of tau takes 0.006526470184326172 s.
+--------------------------
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