avoid a couple needless copies
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@ -1106,7 +1106,7 @@ difficulty_type Blockchain::get_next_difficulty_for_alternative_chain(const std:
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size_t count = 0;
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size_t max_i = timestamps.size()-1;
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// get difficulties and timestamps from most recent blocks in alt chain
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for (const auto bei: boost::adaptors::reverse(alt_chain))
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for (const auto &bei: boost::adaptors::reverse(alt_chain))
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{
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timestamps[max_i - count] = bei.bl.timestamp;
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cumulative_difficulties[max_i - count] = bei.cumulative_difficulty;
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@ -1548,7 +1548,7 @@ namespace hw {
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const bool need_additional_txkeys_x = need_additional_txkeys;
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std::vector<crypto::secret_key> additional_tx_keys_x;
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for (const auto k: additional_tx_keys) {
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for (const auto &k: additional_tx_keys) {
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additional_tx_keys_x.push_back(hw::ledger::decrypt(k));
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}
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