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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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src/blockchain_db/lmdb/db_lmdb.h
+2 -1
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@@ -287,10 +287,11 @@ public:
* @param amounts optional set of amounts to lookup
* @param unlocked whether to restrict count to unlocked outputs
* @param recent_cutoff timestamp to determine which outputs are recent
* @param min_count return only amounts with at least that many instances
*
* @return a set of amount/instances
*/
std::map<uint64_t, std::tuple<uint64_t, uint64_t, uint64_t>> 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>> get_output_histogram(const std::vector<uint64_t> &amounts, bool unlocked, uint64_t recent_cutoff, uint64_t min_count) const;
private:
void do_resize(uint64_t size_increase=0);