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core: speed up output index unique set calculation

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A sort+uniq step was done for every tx in a 200 block chunk,
causing a lot of repeated scanning as the size of the offset
map got larger with every added tx. We now do the step only
once at the end of the loop.
Doing it this way potentially uses more memory, but testing
shows that it's currently only about 2% more.
This commit is contained in:
moneromooo-monero 2017-08-01 14:06:12 +01:00
parent 19d7f568ce
commit 5d4ef719b9
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1 changed files with 8 additions and 8 deletions
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16
src/cryptonote_core/blockchain.cpp
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@ -3866,17 +3866,17 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
offset_map[in_to_key.amount].push_back(offset);
}
// sort and remove duplicate absolute_offsets in offset_map
for (auto &offsets : offset_map)
{
std::sort(offsets.second.begin(), offsets.second.end());
auto last = std::unique(offsets.second.begin(), offsets.second.end());
offsets.second.erase(last, offsets.second.end());
}
}
}
// sort and remove duplicate absolute_offsets in offset_map
for (auto &offsets : offset_map)
{
std::sort(offsets.second.begin(), offsets.second.end());
auto last = std::unique(offsets.second.begin(), offsets.second.end());
offsets.second.erase(last, offsets.second.end());
}
// [output] stores all transactions for each tx_out_index::hash found
std::vector<std::unordered_map<crypto::hash, cryptonote::transaction>> transactions(amounts.size());