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remove the redundant copy when move item to the front of the lru list in lru_cache.hpp #870

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remove the redundant copy when move item to the front of the lru list in lru_cache.hpp #870

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11 changes: 2 additions & 9 deletions include/boost/compute/detail/lru_cache.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -93,16 +93,9 @@ class lru_cache
typename list_type::iterator j = i->second.second;
if(j != m_list.begin()){
// move item to the front of the most recently used list
m_list.erase(j);
m_list.push_front(key);

// update iterator in map
j = m_list.begin();
const value_type &value = i->second.first;
m_map[key] = std::make_pair(value, j);

m_list.splice(m_list.begin(), m_list, j, std::next(j));
// return the value
return value;
return i->second.first;
}
else {
// the item is already at the front of the most recently
Expand Down