Re: suggestion for pre-c++11 two item container compatible with vector?
On Monday, June 10, 2013 9:58:13 AM UTC+1, Juha Nieminen wrote:
James Kanze <james.kanze@gmail.com> wrote:
On Wednesday, June 5, 2013 8:31:02 AM UTC+1, Juha Nieminen wrote:
Shriramana Sharma <samjnaa@gmail.com> wrote:
Hello. In my app I am having to return short arrays of doubles frequently
from utility functions, the max length being 2.
Then why, exactly, are you even considering using std::vector for this?
If std::vector provides the interface and the behavior he wants,
why should he consider anything else?
Because it consumes twenty times the memory and is a hundred times slower
for this particular purpose?
If the profiler says that performance is a problem, then of
course, you solve it. Otherwise, why bother? Extra work, and
the results are more difficult to read, since the reader needs
to learn your solution. (Of course, if part of the class
invariant is "coord.size() == 3", you might want to consider a
type where this is guaranteed: std::array if you have C++11, or
even double[3] if you don't.)
--
James
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