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speedup get_output_histogram for all amounts when min_count > 0

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This skips the vast majority of "dust" output amounts with just
one instance on the chain. Clocks in at 0.15% of the original
time on testnet.
This commit is contained in:
moneromooo-monero
2018-03-22 17:51:58 +00:00
parent 2dae0f203a
commit ffeeefde60
6 changed files with 16 additions and 10 deletions
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11
src/blockchain_db/lmdb/db_lmdb.cpp
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@@ -3086,7 +3086,7 @@ void BlockchainLMDB::get_output_tx_and_index(const uint64_t& amount, const std::
LOG_PRINT_L3("db3: " << db3);
}
std::map<uint64_t, std::tuple<uint64_t, uint64_t, uint64_t>> BlockchainLMDB::get_output_histogram(const std::vector<uint64_t> &amounts, bool unlocked, uint64_t recent_cutoff) const
std::map<uint64_t, std::tuple<uint64_t, uint64_t, uint64_t>> BlockchainLMDB::get_output_histogram(const std::vector<uint64_t> &amounts, bool unlocked, uint64_t recent_cutoff, uint64_t min_count) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
@@ -3112,7 +3112,8 @@ std::map<uint64_t, std::tuple<uint64_t, uint64_t, uint64_t>> BlockchainLMDB::get
mdb_size_t num_elems = 0;
mdb_cursor_count(m_cur_output_amounts, &num_elems);
uint64_t amount = *(const uint64_t*)k.mv_data;
histogram[amount] = std::make_tuple(num_elems, 0, 0);
if (num_elems >= min_count)
histogram[amount] = std::make_tuple(num_elems, 0, 0);
}
}
else
@@ -3123,13 +3124,15 @@ std::map<uint64_t, std::tuple<uint64_t, uint64_t, uint64_t>> BlockchainLMDB::get
int ret = mdb_cursor_get(m_cur_output_amounts, &k, &v, MDB_SET);
if (ret == MDB_NOTFOUND)
{
histogram[amount] = std::make_tuple(0, 0, 0);
if (0 >= min_count)
histogram[amount] = std::make_tuple(0, 0, 0);
}
else if (ret == MDB_SUCCESS)
{
mdb_size_t num_elems = 0;
mdb_cursor_count(m_cur_output_amounts, &num_elems);
histogram[amount] = std::make_tuple(num_elems, 0, 0);
if (num_elems >= min_count)
histogram[amount] = std::make_tuple(num_elems, 0, 0);
}
else
{