Comments on: .net String vs. StringBuilder – concatenation performance

By: subhash

subhash — Wed, 16 Apr 2008 14:35:36 +0000

how Strings useful than the StringBuffer

By: Rahul Patil

Rahul Patil — Mon, 14 Apr 2008 09:36:47 +0000

good article.
but clear differences are not given.
point #1: If the new resulting string wouldn't fit into the buffer, a new buffer is allocated and the old contents are moved in. In no case new objects need to be created.
is not differentiating stringbuilder with string cause in case of string class also this thing happens.
so clear differentiation must be given

By: Nachi

Nachi — Fri, 04 Jan 2008 05:33:36 +0000

Nice Article an useful one.

By: David Cumps

David Cumps — Sun, 16 Sep 2007 17:49:52 +0000

I've taken the liberty to do some additional testing into the memory usage of various methods.
Might be useful: http://blog.cumps.be/string-concatenation-vs-memory-allocation/

By: Peter

Peter — Fri, 10 Aug 2007 02:57:14 +0000

Entry form garbled the pasted code, second try:
for (int j = 0; j 0;)
sargs[i] = s2;
String.Concat(sargs);
}

By: Peter

Peter — Fri, 10 Aug 2007 02:50:14 +0000

Nobody should be using single concats over a bounded list of strings. Consider that most concatenations are bounded and in those cases StringBuilder cannot ever perform better than String.Concat(). The concat code above is flawed in thinking that one would use single concats over and over. Compare the StringBuilder code with this version of concat:
for (int j = 0; j 0;)
sargs[i] = s2;
String.Concat(sargs);
}
This concat runs almost twice as fast as StringBuilder at any loop count. And this is not just true of loops, as long as the counts are bounded, Concat is always faster.
There are definitely times when you should use StringBuilder, but general concatenation of strings is not one of them – no matter the number of strings being concatenated.

By: Scott Bateman

Scott Bateman — Sat, 04 Aug 2007 04:25:11 +0000

Agreed that there are certain situations where the StringBuilder is useful, but in general I think it is not necessary and probably overused by most developers.
Check out my reasoning here:
http://codeslammer.wordpress.com/2007/07/07/do-not-use-the-stringbuilder/

By: nupur nag

nupur nag — Wed, 06 Jun 2007 13:11:13 +0000

sir,
How to concatenate different values of buttons i a single textbox in C#.net

By: Monica

Monica — Wed, 14 Mar 2007 12:27:15 +0000

Thanks so much for this–I had an app that was doing a large number of concatenations. In this case I knew what the final string length would be. I preset the starting capacity on all the stringbuilders used in the app–it actually visibly improved speed!

By: Nirbhay Kumar Singh

Nirbhay Kumar Singh — Mon, 05 Mar 2007 07:43:28 +0000

This is the very very excelent way of comparission between string and stringbuilder