BENCHMARK - POINTCLOUD MATRIX SERIALIZATION

@time Pbuf1 = bufferizeMatrixByRows(pointcloud);
0.826723 seconds (6.18 M allocations: 612.994 MiB, 8.76% gc time)

@time Pbuf2 = reshape(pointcloud,(18541467,1));
  0.000015 seconds (1 allocation: 64 bytes)

@time Pbuf3 = vec(pointcloud);
0.003846 seconds (1.15 k allocations: 72.968 KiB, 98.35% compilation time)
