Avoid unnecessary copy value and map.find in lru_cache#859
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cheerconi wants to merge 2 commits intoboostorg:masterfrom
Open
Avoid unnecessary copy value and map.find in lru_cache#859cheerconi wants to merge 2 commits intoboostorg:masterfrom
cheerconi wants to merge 2 commits intoboostorg:masterfrom
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The operator[] is a find-or-add operator. Use m_map.emplace to avoid add operation. And use i->second.second to avoid find operation.