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Avoid unnecessary copy value and map.find in lru_cache #859

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Avoid unnecessary copy value and map.find in lru_cache #859

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@cheerconi cheerconi commented Jan 15, 2021

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.
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coveralls commented Jan 16, 2021

Coverage Status

Coverage decreased (-0.006%) to 84.013% when pulling d0e7f5a on cheerconi:master into 36c8913 on boostorg:master.
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