Half of CPU time in memory copying

[luchete80]

Stresses calc: 0.356
Max disp 3.95261e-05, 3.95248e-05, 0
Time 0.0006001, GPU time 9.74
Forces calc: 4.544
Stresses calc: 0.422
Max disp 4.4984e-05, 4.49843e-05, 0
Time 0.0007001, GPU time 11.285
Forces calc: 5.301
Stresses calc: 0.497
Max disp 5.82305e-05, 5.82219e-05, 0
Time 0.0008001, GPU time 12.86
Forces calc: 6.041
Stresses calc: 0.58
Max disp 7.35081e-05, 7.35076e-05, 0
Time 0.0009001, GPU time 14.426
Forces calc: 6.797
Stresses calc: 0.647
Max disp 0.000104503, 0.000104502, 0
Time 0.0010001, GPU time 15.881
Forces calc: 7.542
Stresses calc: 0.704
Max disp 0.000126973, 0.000126967, 0
Total steps: 10001, time spent 15.884000
Program ended.