diff --git a/libethereum/BlockChain.cpp b/libethereum/BlockChain.cpp
index 03c5c6525..832d9465f 100644
--- a/libethereum/BlockChain.cpp
+++ b/libethereum/BlockChain.cpp
@@ -522,16 +522,19 @@ h256s BlockChain::import(bytes const& _block, OverlayDB const& _db, bool _force)
 			// Collate logs into blooms.
 			h256s alteredBlooms;
 			{
-				WriteGuard l(x_blocksBlooms);
 				LogBloom blockBloom = bi.logBloom;
 				blockBloom.shiftBloom<3>(sha3(bi.coinbaseAddress.ref()));
-				unsigned index = (unsigned)bi.number;
-				for (unsigned level = 0; level < c_bloomIndexLevels; level++, index /= c_bloomIndexSize)
+
+				// Pre-memoize everything we need before locking x_blocksBlooms
+				for (unsigned level = 0, index = (unsigned)bi.number; level < c_bloomIndexLevels; level++, index /= c_bloomIndexSize)
+					blocksBlooms(chunkId(level, index / c_bloomIndexSize));
+
+				WriteGuard l(x_blocksBlooms);
+				for (unsigned level = 0, index = (unsigned)bi.number; level < c_bloomIndexLevels; level++, index /= c_bloomIndexSize)
 				{
 					unsigned i = index / c_bloomIndexSize;
 					unsigned o = index % c_bloomIndexSize;
 					alteredBlooms.push_back(chunkId(level, i));
-					blocksBlooms(alteredBlooms.back());
 					m_blocksBlooms[alteredBlooms.back()].blooms[o] |= blockBloom;
 				}
 			}
diff --git a/libethereum/Client.cpp b/libethereum/Client.cpp
index d73299877..3d9f17335 100644
--- a/libethereum/Client.cpp
+++ b/libethereum/Client.cpp
@@ -145,7 +145,7 @@ Client::Client(p2p::Host* _extNet, std::string const& _dbPath, WithExisting _for
 Client::Client(p2p::Host* _extNet, std::shared_ptr<GasPricer> _gp, std::string const& _dbPath, WithExisting _forceAction, u256 _networkId, int _miners):
 	Worker("eth"),
 	m_vc(_dbPath),
-	m_bc(_dbPath, max(m_vc.action(), _forceAction), [](unsigned d, unsigned t){ cerr << "REVISING BLOCKCHAIN: Processed " << d << " of " << t << "..." << endl; }),
+	m_bc(_dbPath, max(m_vc.action(), _forceAction), [](unsigned d, unsigned t){ cerr << "REVISING BLOCKCHAIN: Processed " << d << " of " << t << "...\r"; }),
 	m_gp(_gp),
 	m_stateDB(State::openDB(_dbPath, max(m_vc.action(), _forceAction))),
 	m_preMine(Address(), m_stateDB),