diff --git a/src/hashtree.py b/src/hashtree.py
--- a/src/hashtree.py
+++ b/src/hashtree.py
@@ -1,5 +1,6 @@
 import hashlib
 import os
+from datetime import datetime
 
 from util import progress
 
@@ -22,13 +23,14 @@ class HashTree:
 			size=stat.st_size # !! symlinks
 			leafCount=(size-1)//HashTree.BLOCK_SIZE+1 # number of leaf blocks
 			res=cls(leafCount)
-			print("hashing file:")
+			print(datetime.now(), "hashing file:")
 
 			for i in range(leafCount):
 				data=f.read(HashTree.BLOCK_SIZE)
 				res.insertLeaf(hashlib.sha256(data).digest()[HashTree.HASH_LEN:])
 
 				progress(i, leafCount)
+			print("100%")
 		res.buildTree()
 		
 		return res
@@ -73,10 +75,11 @@ class HashTree:
 			
 	## Fast construction of the tree over the leaves. O(n).
 	def buildTree(self):
-		print("building tree:")
+		print(datetime.now(), "building tree:")
 		for i in range(self.leafStart-1,-1,-1):
 			self.store[i]=hashlib.sha256(self.store[i*2+1]+self.store[i*2+2]).digest()[HashTree.HASH_LEN:]
 			progress(i, -1, self.leafStart - 1)
+		print()
 
 
 if __name__=="__main__":