diff --git a/command/core.py b/command/core.py
index <HASH>..<HASH> 100644
--- a/command/core.py
+++ b/command/core.py
@@ -61,7 +61,7 @@ class Command(object):
 
                         line = thefile.readline()
                         if not line:
-                            time.sleep(0.001)
+                            time.sleep(0.00001)
                             continue
                         yield line
Check for data more often. Python 3 seems to need it