diff --git a/HISTORY.rst b/HISTORY.rst
index caacc03..e8b7a29 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -233,7 +233,8 @@ History
 * bug fixed in plt_utils
 * plt_imshow added to plt_utils
 
-0.10.10 (2024-01-25)
+0.10.10 (2024-01-30)
 ------------------
 * rgb2hsv is added
-* plt_imshow supports complex color map and is bug free
\ No newline at end of file
+* plt_imshow supports complex color map and is bug free
+* added printprogress to loopprocessor
\ No newline at end of file
diff --git a/lognflow/loopprocessor.py b/lognflow/loopprocessor.py
index 32abe74..88a374d 100644
--- a/lognflow/loopprocessor.py
+++ b/lognflow/loopprocessor.py
@@ -23,7 +23,7 @@ def _loopprocessor_function(
 class loopprocessor():
     def __init__(self, 
             targetFunction, n_cpu = None, test_mode = False, logger = print,
-            concatenate_outputs = True, verbose = True):
+            concatenate_outputs = True, verbose = True, n_processes = 0):
         self.targetFunction = targetFunction
         self.test_mode = test_mode
         self.aQ = Queue()
@@ -33,9 +33,15 @@ def __init__(self,
         else:
             self.n_cpu = n_cpu
         self.verbose = verbose
-        if(self.verbose):
+        self.n_processes = n_processes
+        if self.verbose:
             self.logger = logger
             self.logger(f'lognflow loopprocessor initialized with {self.n_cpu} CPUs.')
+            if self.n_processes:
+                assert self.n_processes > 0
+                assert self.n_processes == int(self.n_processes)
+                from .printprogress import printprogress
+                self.pBar = printprogress(self.n_processes)
 
         self.outputs_is_given = False
         self.outputs = []
@@ -68,6 +74,8 @@ def __call__(self, *args, **kwargs):
                 ret_result = aQElement[1]
                 if ((not self.any_error) & aQElement[2]):
                     self.any_error = True
+                    if self.n_processes:
+                        del self.pBar
                     self.empty_queue = True
                     error_ret_procID = ret_procID_range.copy()
                     self.logger('')
@@ -78,6 +86,8 @@ def __call__(self, *args, **kwargs):
                     for ret_procID, result in zip(ret_procID_range, ret_result):
                         self.Q_procID.append(ret_procID)
                         self.outputs.append(result)
+                        if self.n_processes:
+                            self.pBar()
                 elif(self.numBusyCores):
                     self.logger(f'Number of busy cores: {self.numBusyCores}')
     
diff --git a/tests/test_multiprocessor.py b/tests/test_multiprocessor.py
index 71fa687..da19ae6 100644
--- a/tests/test_multiprocessor.py
+++ b/tests/test_multiprocessor.py
@@ -168,7 +168,7 @@ def test_loopprocessor():
     print('-'*80, '\n', inspect.stack()[0][3], '\n', '-'*80)
 
     N = 16
-    D = 100000
+    D = 1000000
     data = (100+10*np.random.randn(N,D)).astype('int')
     mask = (2*np.random.rand(N,D)).astype('int')