db_lmdb: speedup the get_output_distribution common case
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@ -1971,14 +1971,25 @@ std::vector<uint64_t> BlockchainLMDB::get_block_cumulative_rct_outputs(const std
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MDB_val v;
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uint64_t prev_height = heights[0];
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for (uint64_t height: heights)
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{
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MDB_val_set(v, height);
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result = mdb_cursor_get(m_cur_block_info, (MDB_val *)&zerokval, &v, MDB_GET_BOTH);
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if (height == prev_height + 1)
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{
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MDB_val k2;
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result = mdb_cursor_get(m_cur_block_info, &k2, &v, MDB_NEXT);
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}
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else
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{
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v.mv_size = sizeof(uint64_t);
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v.mv_data = (void*)&height;
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result = mdb_cursor_get(m_cur_block_info, (MDB_val *)&zerokval, &v, MDB_GET_BOTH);
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}
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if (result)
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throw0(DB_ERROR(lmdb_error("Error attempting to retrieve rct distribution from the db: ", result).c_str()));
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const mdb_block_info *bi = (const mdb_block_info *)v.mv_data;
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res.push_back(bi->bi_cum_rct);
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prev_height = height;
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}
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TXN_POSTFIX_RDONLY();
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