jython and concatenation of strings
steven.bethard at gmail.com
Mon Dec 13 18:24:52 CET 2004
Jan Gregor wrote:
> I found that price of += operator on string is too high in jython. For
> example 5000 such operations took 90 seconds (i generated html copy of
> table with 1000 rows and 5 columns). Generation of row data into separate
> string and joining after lead to time 13 seconds !!!
> What's alternative way to do that ? (similiar parts of my code are terribbly
> slow and such simple solution as above didn't help).
I don't use Jython, but are you not able to do something like:
string_list = 
for ... in ...:
string = ''.join(string_list)
This is the usual Python idiom and is usually faster than the += idiom.
Note too that +ing strings in Java also has this problem -- hence
StringBuffer or whatever it's called.
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