Re: STL container question
On 2008-10-01 10:23:13 -0400, Ioannis Vranos
<ivranos@no.spam.nospamfreemail.gr> said:
Victor Bazarov wrote:
Ioannis Vranos wrote:
Victor Bazarov wrote:
Store first, then sort, then search (using 'std::binary_search'), you
could just use 'std::vector'.
For that case, I think std::list is a better option, since the sorting
will be faster,
Do you have any proof of that?
Lists are implemented using pointers to point to the previous and to
the next elements, so list::sort(), is more efficient by changing
pointer values, while sorting a vector involves copying objects.
In other words, no. <g> One could also point out that quicksort can be
used to sort a vector but can't be used on a list, so obviously sorting
a vector is faster. The problem with both arguments is exactly what
Victor implied: they're handwaving. Proof requires much more detailed
analysis, or if you're making a decision for a particular platform,
measurement.
--
Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
(www.petebecker.com/tr1book)
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