luanti-org/minetestmapper
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Optimize database access further by allowing "brute-force" queries instead of listing available blocks

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Also adds a heuristic that will enable this behaviour automatically.
This commit is contained in:
sfan5
2020-03-27 21:10:00 +01:00
parent 5b264fd443
commit 7ff2288627
14 changed files with 317 additions and 89 deletions
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5
include/db-sqlite3.h
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@@ -11,8 +11,12 @@ public:
std::vector<BlockPos> getBlockPos(BlockPos min, BlockPos max) override;
void getBlocksOnXZ(BlockList &blocks, int16_t x, int16_t z,
int16_t min_y, int16_t max_y) override;
void getBlocksByPos(BlockList &blocks,
const std::vector<BlockPos> &positions) override;
~DBSQLite3() override;
bool preferRangeQueries() const override { return false; }
private:
inline void getPosRange(int64_t &min, int64_t &max, int16_t zPos,
int16_t zPos2) const;
@@ -23,6 +27,7 @@ private:
sqlite3_stmt *stmt_get_block_pos;
sqlite3_stmt *stmt_get_block_pos_z;
sqlite3_stmt *stmt_get_blocks_z;
sqlite3_stmt *stmt_get_block_exact;
int16_t blockCachedZ = -10000;
std::unordered_map<int16_t, BlockList> blockCache; // indexed by X