nicer error printing

stress.py

@@ -30,13 +30,12 @@ nthreads = 0
 
 
 def update_err(err, name, value):
-    if name not in err:
-        err[name] = value
-        print("{}: {}".format(name, value))
-    else:
-        if value > err[name]:
-            err[name] = value
-            print("{}: {}".format(name, value))
+    if name in err and err[name] >= value:
+        return err
+    err[name] = value
+    for (nm, v) in err.items():
+        print("{}: {}".format(nm, v))
+    print()
     return err