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authormoneromooo-monero <moneromooo-monero@users.noreply.github.com>2018-10-19 16:46:52 +0000
committermoneromooo-monero <moneromooo-monero@users.noreply.github.com>2018-10-19 16:47:29 +0000
commit61304151b45b8adf14ed1822971ce59dc57b6f5c (patch)
tree730db4b2cb71e71198fc9815707cf2b1bcb9ef45 /src/blockchain_db
parentMerge pull request #4610 (diff)
downloadmonero-61304151b45b8adf14ed1822971ce59dc57b6f5c.tar.xz
db_lmdb: use MDB_MULTIPLE_NEXT where possible for some speedup
Diffstat (limited to 'src/blockchain_db')
-rw-r--r--src/blockchain_db/lmdb/db_lmdb.cpp32
1 files changed, 23 insertions, 9 deletions
diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index bd91f308a..0afadcd8d 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -1980,22 +1980,36 @@ std::vector<uint64_t> BlockchainLMDB::get_block_cumulative_rct_outputs(const std
MDB_val v;
uint64_t prev_height = heights[0];
+ uint64_t range_begin = 0, range_end = 0;
for (uint64_t height: heights)
{
- if (height == prev_height + 1)
+ if (height >= range_begin && height < range_end)
{
- MDB_val k2;
- result = mdb_cursor_get(m_cur_block_info, &k2, &v, MDB_NEXT);
+ // nohting to do
}
else
{
- v.mv_size = sizeof(uint64_t);
- v.mv_data = (void*)&height;
- result = mdb_cursor_get(m_cur_block_info, (MDB_val *)&zerokval, &v, MDB_GET_BOTH);
+ if (height == prev_height + 1)
+ {
+ MDB_val k2;
+ result = mdb_cursor_get(m_cur_block_info, &k2, &v, MDB_NEXT_MULTIPLE);
+ range_begin = ((const mdb_block_info*)v.mv_data)->bi_height;
+ range_end = range_begin + v.mv_size / sizeof(mdb_block_info); // whole records please
+ if (height < range_begin || height >= range_end)
+ throw0(DB_ERROR(("Height " + std::to_string(height) + " not included in multuple record range: " + std::to_string(range_begin) + "-" + std::to_string(range_end)).c_str()));
+ }
+ else
+ {
+ v.mv_size = sizeof(uint64_t);
+ v.mv_data = (void*)&height;
+ result = mdb_cursor_get(m_cur_block_info, (MDB_val *)&zerokval, &v, MDB_GET_BOTH);
+ range_begin = height;
+ range_end = range_begin + 1;
+ }
+ if (result)
+ throw0(DB_ERROR(lmdb_error("Error attempting to retrieve rct distribution from the db: ", result).c_str()));
}
- if (result)
- throw0(DB_ERROR(lmdb_error("Error attempting to retrieve rct distribution from the db: ", result).c_str()));
- const mdb_block_info *bi = (const mdb_block_info *)v.mv_data;
+ const mdb_block_info *bi = ((const mdb_block_info *)v.mv_data) + (height - range_begin);
res.push_back(bi->bi_cum_rct);
prev_height = height;
}