data structures - vector of list. Should I use pointers or values? -


i implementing data struct hash table collisions resolved using chains.

so underlying data structure need vector of lists.
choice 2 variants:

  • std::vector<std::list<entry> >
  • std::vector<std::list<entry>* >

where entry struct contains data , hash value;

question: huge decrease in efficiency if use first variant(question considered on large input data)?

thank in advance!

there's no advantage using pointer, , adds complication of needing deleted when destroy vector. go ahead , use vector<list<entry> >. list allocating memory elements anyway, invisible you.

there might performance penalty if vector has resized, c++11 compiler should use moves instead of copies minimize it. , learning project performance shouldn't first concern anyway.


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