diff --git a/Makefile b/Makefile
index 02f50a3..71ec49b 100644
--- a/Makefile
+++ b/Makefile
@@ -73,7 +73,7 @@ doc/.doxygen.stamp: $(wildcard *.c) $(wildcard *.h) Doxyfile
 checks: runtest unittest benchmark
 
 benchmark: pyrpn.so
-	PYTHONPATH=`pwd` $(PYTHON) tests/benchmark.py
+	PYTHONPATH=`pwd` $(PYTHON) tests/benchmark.py 0x200 0x3000
 
 unittest: pyrpn.so
 	PYTHONPATH=`pwd` $(PYTHON) -m unittest
diff --git a/tests/benchmark.py b/tests/benchmark.py
index c9ec59c..f8342b9 100644
--- a/tests/benchmark.py
+++ b/tests/benchmark.py
@@ -3,6 +3,8 @@
 import sys
 import random
 import time
+import warnings
+
 
 try:
     import pyrpn
@@ -11,29 +13,48 @@ except (ImportError, NameError) as e:
           file=sys.stderr)
     raise e
 
-
-expr_count = 0x200
-max_iter = 0x3000
+#expr_count = 0x200
+#max_iter = 0x3000
+#argc = 2
+#sz = 0x20
+expr_count = 5000
+max_iter = 0x5000
 argc = 2
-sz = 0x10
+sz = 0x30
+
+try:
+    from tqdm import tqdm
+    tqr = lambda m: tqdm(range(m), unit='expr', unit_scale=True,
+                         #unit_scale=max_iter>>10,
+                         mininterval=.15)
+    write=False
+except (ImportError, NameError) as e:
+    warnings.warn('tqdm not found')
+    tqr = range
+    write=True
 
 if len(sys.argv) > 1:
     expr_count = int(sys.argv[1], 0)
 if len(sys.argv) > 2:
     max_iter = int(sys.argv[2], 0)
 if len(sys.argv) > 3:
-    argc = int(sys.argv[3], 0)
-if len(sys.argv) > 4:
     sz = int(sys.argv[4], 0)
+if len(sys.argv) > 4:
+    argc = int(sys.argv[3], 0)
 
 tot = 0
 time_op = 0
 start = time.time()
 IMAX = (1<<63)-1
 samples = 8
+
+print("Running %dK iter on %d expressions with %d op" % (max_iter//1000,
+                                                         expr_count,
+                                                         sz))
+
 rnd_samples = [[[random.randint(0, IMAX) for _ in range(argc)] for _ in range(max_iter)]
                for _ in range(samples)]
-for i in range(expr_count):
+for i in tqr(expr_count):
     rnd_expr = pyrpn.random_expr(argc, sz)
     all_start = time.time()
     expr = pyrpn.RPNExpr(rnd_expr, argc)
@@ -43,9 +64,15 @@ for i in range(expr_count):
         expr.eval(*rnd)
     time_op += time.time() - start_op
     tot += time.time() - all_start
-    sys.stderr.write(".")
-    sys.stderr.flush()
-sys.stderr.write("\n")
+    if write:
+        sys.stderr.write(".")
+        sys.stderr.flush()
+if write:
+    sys.stderr.write("\n")
 total = time.time() - start
-print("Runned %.2fs" % total)
-print("%.1fK iter/s %.1fms per expr" % (max_iter*expr_count/time_op/1000, tot/expr_count*1000))
+print("Runned %dK iter on %d expressions in %.2fs" % (max_iter//1000,
+                                                     expr_count, total))
+msg = "%.1fK iter/s %.1fms per expr (%dK iter, %d op per expr)"
+msg %= (max_iter*expr_count/time_op/1000, tot/expr_count*1000,
+        max_iter//1000, sz)
+print(msg)