Diff for "ConcatenationTestCode"

Differences between revisions 3 and 4

Counter to the PythonSpeed/PerformanceTips, on python 2.4 the following string concatenation is almost twice as fast:

   1 from time import time
   2 t = time()
   3 
   4 s = 'lksdajflakjdsflku09uweoir'
   5 for x in range(40):
   6     s += s[len(s)/2:]
   7     
   8 print 'duration:', time()-t

as:

Toggle line numbers

   1 from time import time
   2 t = time()
   3 
   4 s = 'lksdajflakjdsflku09uweoir'
   5 for x in range(40):
   6     s = "".join((s, s[len(s)/2:]))
   7     
   8 print 'duration:', time()-t

On the win32 Python 2.4 I'm seeing the join sample above complete in less than half the time of the concatenating sample.

-  ⇤ ← Revision 3 as of 2005-05-19 16:24:58 → 
  Size: 479
  Editor: dhcp-130-65-200-92
  Comment:
+   ← Revision 4 as of 2005-07-28 08:53:30 → ⇥
  Size: 618
  Editor: 158
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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+----
On the win32 Python 2.4 I'm seeing the join sample above complete in less than half the time of the concatenating sample.
 -db

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