DataArray and VecDataArray are doing too many heap allocations
Both DataArray and VecDataArray are doing allocations/deletions in cases where its not necessary.
clear()is implemented as
resize(0)which not only deletes the current memory but additionally also allocates new memory of size 1
This should probably be implemented as a constant time
m_size=0 without allocations
resize()for any case where the new capacity is smaller than the existing capacity also allocates new memory, this should probably be implemented as just a simple change to
A change here though would impact #297 (closed) maybe other systems that rely on the internal data pointer.