diff --git a/libethcore/Ethasher.cpp b/libethcore/Ethasher.cpp
index bad5e6751..80c263673 100644
--- a/libethcore/Ethasher.cpp
+++ b/libethcore/Ethasher.cpp
@@ -128,6 +128,6 @@ Ethasher::Result Ethasher::eval(BlockInfo const& _header, Nonce const& _nonce)
 	auto p = Ethasher::params(_header);
 	ethash_return_value r;
 	ethash_compute_light(&r, Ethasher::get()->cache(_header).data(), &p, _header.headerHash(WithoutNonce).data(), (uint64_t)(u64)_nonce);
-	cdebug << "Ethasher::eval sha3(cache):" << sha3(Ethasher::get()->cache(_header)) << "hh:" << _header.headerHash(WithoutNonce) << "nonce:" << _nonce << " => " << h256(r.result, h256::ConstructFromPointer);
+//	cdebug << "Ethasher::eval sha3(cache):" << sha3(Ethasher::get()->cache(_header)) << "hh:" << _header.headerHash(WithoutNonce) << "nonce:" << _nonce << " => " << h256(r.result, h256::ConstructFromPointer);
 	return Result{h256(r.result, h256::ConstructFromPointer), h256(r.mix_hash, h256::ConstructFromPointer)};
 }
diff --git a/libethcore/Ethasher.h b/libethcore/Ethasher.h
index 72dfb910a..c160d38da 100644
--- a/libethcore/Ethasher.h
+++ b/libethcore/Ethasher.h
@@ -87,7 +87,7 @@ public:
 		inline h256 mine(uint64_t _nonce)
 		{
 			ethash_compute_full(&m_ethashReturn, m_datasetPointer, &m_params, m_headerHash.data(), _nonce);
-			cdebug << "Ethasher::mine hh:" << m_headerHash << "nonce:" << (Nonce)(u64)_nonce << " => " << h256(m_ethashReturn.result, h256::ConstructFromPointer);
+//			cdebug << "Ethasher::mine hh:" << m_headerHash << "nonce:" << (Nonce)(u64)_nonce << " => " << h256(m_ethashReturn.result, h256::ConstructFromPointer);
 			return h256(m_ethashReturn.result, h256::ConstructFromPointer);
 		}