Late initialization of iterator in kll sketch
diff --git a/kll/include/kll_quantile_calculator_impl.hpp b/kll/include/kll_quantile_calculator_impl.hpp
index 23efa4d..ff6e547 100644
--- a/kll/include/kll_quantile_calculator_impl.hpp
+++ b/kll/include/kll_quantile_calculator_impl.hpp
@@ -129,10 +129,11 @@
const uint8_t num_levels_2 = num_levels - num_levels_1;
const uint8_t starting_level_1 = starting_level;
const uint8_t starting_level_2 = starting_level + num_levels_1;
- const auto chunk_begin = temp.begin() + temp.size();
+ const auto initial_size = temp.size();
merge_sorted_blocks_reversed(orig, temp, levels, starting_level_1, num_levels_1);
merge_sorted_blocks_reversed(orig, temp, levels, starting_level_2, num_levels_2);
const uint32_t num_items_1 = levels[starting_level_1 + num_levels_1] - levels[starting_level_1];
+ const auto chunk_begin = temp.begin() + initial_size;
std::merge(
std::make_move_iterator(chunk_begin), std::make_move_iterator(chunk_begin + num_items_1),
std::make_move_iterator(chunk_begin + num_items_1), std::make_move_iterator(temp.end()),
