title: Unexpected output of (Python) time.clock()
body: <p>Having some trouble understanding the output from time.clock():</p>
  
  <p>Linux 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
  Distributor ID: LinuxMint
  Description:    Linux Mint 14 Nadia
  Release:    14
  Codename:   nadia</p>
  
  <pre><code>Python 2.7.3 (default, Sep 26 2012, 21:51:14) 
  [GCC 4.7.2] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; from time import clock, sleep, time
  &gt;&gt;&gt; while True: sleep(1); print clock()
  ... 
  0.03
  0.03
  0.03
  0.03
  0.03
  ^CTraceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  KeyboardInterrupt
  &gt;&gt;&gt; while True: sleep(1); print time()
  ... 
  1382460160.37
  1382460161.37
  1382460162.37
  1382460163.38
  1382460164.38
  ^CTraceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  KeyboardInterrupt
  
  # ...wait a few minutes...
  
  &gt;&gt;&gt; while True: sleep(1); print clock()
  ... 
  0.04
  0.04
  0.04
  0.04
  0.04
  0.04
  ^CTraceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  KeyboardInterrupt
  &gt;&gt;&gt; 
  
  $ cat test.py
  #! /usr/bin/python
  
  from time import sleep, time, clock
  
  while True:
      print clock(), time()
      sleep(1)
  
  
  $ python test.py
  0.02 1382460623.39
  0.02 1382460624.39
  0.02 1382460625.39
  0.02 1382460626.39
  0.02 1382460627.39
  0.02 1382460628.39
  0.02 1382460629.4
  0.02 1382460630.4
  0.02 1382460631.4
  0.02 1382460632.4
  0.02 1382460633.4
  0.02 1382460634.4
  0.02 1382460635.4
  0.02 1382460636.4
  0.02 1382460637.41
  0.02 1382460638.41
  0.02 1382460639.41
  0.02 1382460640.41
  0.02 1382460641.41
  0.02 1382460642.41
  0.02 1382460643.41
  0.02 1382460644.41
  0.02 1382460645.41
  0.02 1382460646.42
  0.02 1382460647.42
  0.02 1382460648.42
  0.02 1382460649.42
  0.02 1382460650.42
  ^CTraceback (most recent call last):
    File "test.py", line 7, in &lt;module&gt;
      sleep(1)
  KeyboardInterrupt
  </code></pre>
  
  <p>I'm obviously missing something obvious here?</p>