diff --git a/packages/bitcore-node/src/models/transaction.ts b/packages/bitcore-node/src/models/transaction.ts
index 5ff50fda448..408e70a14bf 100644
--- a/packages/bitcore-node/src/models/transaction.ts
+++ b/packages/bitcore-node/src/models/transaction.ts
@@ -224,7 +224,7 @@ export class Transaction extends BaseModel<ITransaction> {
           // TODO: Fee is negative for mempool txs
           fee = groupedSpends[txid].total - groupedMints[txid].total;
           if (fee < 0) {
-            console.error(txid, groupedSpends[txid], groupedMints[txid]);
+            logger.debug('negative fee', txid, groupedSpends[txid], groupedMints[txid]);
           }
         }
 
diff --git a/packages/bitcore-node/test/benchmark/benchmark.ts b/packages/bitcore-node/test/benchmark/benchmark.ts
index 07cbcc3fd5f..d074435bfbb 100644
--- a/packages/bitcore-node/test/benchmark/benchmark.ts
+++ b/packages/bitcore-node/test/benchmark/benchmark.ts
@@ -21,6 +21,14 @@ function* generateBlocks(blockCount: number, blockSizeMb: number) {
   }
 }
 
+function preGenerateBlocks(blockCount: number, blockSizeMb: number) {
+  const blocks = new Array<BitcoinBlockType>();
+  for (let block of generateBlocks(blockCount, blockSizeMb)) {
+    blocks.push(block);
+  }
+  return blocks;
+}
+
 function generateBlock(blockSizeMb: number, previousBlock?: BitcoinBlockType): BitcoinBlockType {
   const txAmount = 100000;
   const prevHash = previousBlock ? previousBlock.hash : '';
@@ -109,11 +117,15 @@ function startBenchmarkDatabase() {
 
 async function benchmark(blockCount: number, blockSizeMb: number) {
   await resetDatabase();
+  console.log('Generating blocks');
+  const blocks = preGenerateBlocks(blockCount, blockSizeMb);
   const startTime = new Date();
-  for (let block of generateBlocks(blockCount, blockSizeMb)) {
-    console.log('Adding block', block.hash);
+  console.log('Adding blocks');
+  for (let block of blocks) {
+    process.stdout.write('.');
     await BlockModel.addBlock({ block, chain: 'BENCH', network: 'MARK', initialSyncComplete: false });
   }
+  process.stdout.write('\n');
   const endTime = new Date();
   const time = endTime.getTime() - startTime.getTime();
   const seconds = time / 1000;
@@ -123,6 +135,6 @@ async function benchmark(blockCount: number, blockSizeMb: number) {
 }
 
 startBenchmarkDatabase()
-  .then(() => benchmark(160, 1))
+  .then(() => benchmark(80, 1))
   .then(() => benchmark(5, 32))
   .then(() => process.exit());