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db_lmdb: slight speedup getting array data from the blockchain

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This commit is contained in:
moneromooo-monero 2018-10-31 18:52:28 +00:00
parent 99fbe1008b
commit 6f7a5fd4f7
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 8 additions and 6 deletions
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14
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -3160,6 +3160,7 @@ void BlockchainLMDB::get_output_tx_and_index_from_global(const std::vector<uint6
LOG_PRINT_L3("BlockchainLMDB::" << __func__); LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open(); check_open();
tx_out_indices.clear(); tx_out_indices.clear();
tx_out_indices.reserve(global_indices.size());
TXN_PREFIX_RDONLY(); TXN_PREFIX_RDONLY();
RCURSOR(output_txs); RCURSOR(output_txs);
@ -3174,9 +3175,8 @@ void BlockchainLMDB::get_output_tx_and_index_from_global(const std::vector<uint6
else if (get_result) else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx hash")); throw0(DB_ERROR("DB error attempting to fetch output tx hash"));
outtx *ot = (outtx *)v.mv_data; const outtx *ot = (const outtx *)v.mv_data;
auto result = tx_out_index(ot->tx_hash, ot->local_index); tx_out_indices.push_back(tx_out_index(ot->tx_hash, ot->local_index));
tx_out_indices.push_back(result);
} }
TXN_POSTFIX_RDONLY(); TXN_POSTFIX_RDONLY();
@ -3188,6 +3188,7 @@ void BlockchainLMDB::get_output_key(const uint64_t &amount, const std::vector<ui
TIME_MEASURE_START(db3); TIME_MEASURE_START(db3);
check_open(); check_open();
outputs.clear(); outputs.clear();
outputs.reserve(offsets.size());
TXN_PREFIX_RDONLY(); TXN_PREFIX_RDONLY();
@ -3211,19 +3212,19 @@ void BlockchainLMDB::get_output_key(const uint64_t &amount, const std::vector<ui
else if (get_result) else if (get_result)
throw0(DB_ERROR(lmdb_error("Error attempting to retrieve an output pubkey from the db", get_result).c_str())); throw0(DB_ERROR(lmdb_error("Error attempting to retrieve an output pubkey from the db", get_result).c_str()));
output_data_t data;
if (amount == 0) if (amount == 0)
{ {
const outkey *okp = (const outkey *)v.mv_data; const outkey *okp = (const outkey *)v.mv_data;
data = okp->data; outputs.push_back(okp->data);
} }
else else
{ {
const pre_rct_outkey *okp = (const pre_rct_outkey *)v.mv_data; const pre_rct_outkey *okp = (const pre_rct_outkey *)v.mv_data;
outputs.resize(outputs.size() + 1);
output_data_t &data = outputs.back();
memcpy(&data, &okp->data, sizeof(pre_rct_output_data_t)); memcpy(&data, &okp->data, sizeof(pre_rct_output_data_t));
data.commitment = rct::zeroCommit(amount); data.commitment = rct::zeroCommit(amount);
} }
outputs.push_back(data);
} }
TXN_POSTFIX_RDONLY(); TXN_POSTFIX_RDONLY();
@ -3239,6 +3240,7 @@ void BlockchainLMDB::get_output_tx_and_index(const uint64_t& amount, const std::
indices.clear(); indices.clear();
std::vector <uint64_t> tx_indices; std::vector <uint64_t> tx_indices;
tx_indices.reserve(offsets.size());
TXN_PREFIX_RDONLY(); TXN_PREFIX_RDONLY();
RCURSOR(output_amounts); RCURSOR(output_amounts);