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August 23rd, 2008 at 1:38 pm
Can we stop with the pernicious and erroneous assertion that using the ‘+’ operator to concatenate strings is slow.
Run a benchmark first.
For common cases using the + operator to build a string is no slower than the old style String buffer approach. It hasn’t been since around Java 1.4.2 or 1.5. It is slower for large concatenations - assembling say 1000 or more strings into one larger string…
http://paulbarry.com/articles/2007/03/15/java-string-concatenation
http://www.ibm.com/developerworks/java/library/j-jtp04223.html
http://www.javaworld.com/javaforums/showflat.php?Cat=2&Number=94239&an=0&page=0
OK?
August 23rd, 2008 at 7:15 pm
You mean “java.util.ArrayList is to java.util.Vector”.
August 24th, 2008 at 12:06 am
@Porter
I ran a benchmark, you too can run one if you like. Try using + for large concatenation and it really sucks. Yes, I am talking about large amount of Strings like say in a for loop - “best way to concatenate large number of String objects”. I thought I was very clear on that.
August 24th, 2008 at 12:06 am
@Burt
Yes, ArrayList, my bad. Thanks.
August 24th, 2008 at 9:59 am
Here is an article I wrote on the subject:
StringBuffer vs. StringBuilder performance comparison
You might find it useful.
Cheers
August 29th, 2008 at 9:27 am
Thanks for the link