From 0a4fd9f5a719779ce105240b6d2dae2e1f3ec73e Mon Sep 17 00:00:00 2001
From: Guillaume Chazarain <guichaz@gmail.com>
Date: Sat, 29 Aug 2009 15:16:49 +0200
Subject: [PATCH] Faster ui.human_size()

---
 iotop/ui.py | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/iotop/ui.py b/iotop/ui.py
index ad22a05..f636be7 100644
--- a/iotop/ui.py
+++ b/iotop/ui.py
@@ -1,6 +1,7 @@
 import curses
 import errno
 import locale
+import math
 import optparse
 import os
 import pwd
@@ -19,14 +20,10 @@ from iotop.version import VERSION
 UNITS = ['B', 'K', 'M', 'G', 'T', 'P', 'E']
 
 def human_size(size):
-    for i in xrange(len(UNITS) - 1, 0, -1):
-        base = 1 << (10 * i)
-        if 2 * base < size:
-            break
-    else:
-        i = 0
-        base = 1
-    return '%.2f %s' % ((float(size) / base), UNITS[i])
+    if not size:
+        return '0.00 B'
+    expo = int(math.log(size / 2, 2) / 10)
+    return '%.2f %s' % ((float(size) / (1 << (10 * expo))), UNITS[expo])
 
 def format_size(options, bytes):
     if options.kilobytes:
-- 
2.11.4.GIT