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Diffstat (limited to 'boost/random/discrete_distribution.hpp')
| -rw-r--r-- | boost/random/discrete_distribution.hpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/boost/random/discrete_distribution.hpp b/boost/random/discrete_distribution.hpp index 9574cbcae5..c6c25fe822 100644 --- a/boost/random/discrete_distribution.hpp +++ b/boost/random/discrete_distribution.hpp @@ -571,8 +571,12 @@ private: template<class Iter> void init(Iter first, Iter last, std::forward_iterator_tag) { + size_t input_size = std::distance(first, last); std::vector<std::pair<WeightType, IntType> > below_average; std::vector<std::pair<WeightType, IntType> > above_average; + below_average.reserve(input_size); + above_average.reserve(input_size); + WeightType weight_average = _impl.init_average(first, last); WeightType normalized_average = _impl.get_weight(0); std::size_t i = 0; |