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rpc: Speedup getaddressesbylabel

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This commit is contained in:
João Barbosa 2019-02-22 16:07:21 +00:00
parent a094b54332
commit 710a7136f9
1 changed files with 12 additions and 1 deletions
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13
src/wallet/rpcwallet.cpp
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@ -3790,9 +3790,20 @@ static UniValue getaddressesbylabel(const JSONRPCRequest& request)
// Find all addresses that have the given label
UniValue ret(UniValue::VOBJ);
std::set<std::string> addresses;
for (const std::pair<const CTxDestination, CAddressBookData>& item : pwallet->mapAddressBook) {
if (item.second.name == label) {
ret.pushKV(EncodeDestination(item.first), AddressBookDataToJSON(item.second, false));
std::string address = EncodeDestination(item.first);
// CWallet::mapAddressBook is not expected to contain duplicate
// address strings, but build a separate set as a precaution just in
// case it does.
bool unique = addresses.emplace(address).second;
assert(unique);
// UniValue::pushKV checks if the key exists in O(N)
// and since duplicate addresses are unexpected (checked with
// std::set in O(log(N))), UniValue::__pushKV is used instead,
// which currently is O(1).
ret.__pushKV(address, AddressBookDataToJSON(item.second, false));
}
}