Groups > comp.lang.java.programmer > #8130

Re: StringBuilder

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From	Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com>
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Subject	Re: StringBuilder
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On 9/18/11 12:54 AM, Jan Burse wrote:
> Peter Duniho schrieb:
>
>> In any case, if Java does _not_ implement it that way, I suspect that's
>
> Well, I wouldn't say its a matter of *Java*. Its a matter
> of the given JDK how it is implementented. *Java* defines
> the contract but there are many implementations.

It's true, I use "Java" generically here.  So?

> [...]
> I guess it is more about performance tuning than removing
> bottlenecks. And any performance gain is only seen in
> programs that make heavy use of StringBuilder. Such
> measurements have already been done over and over. See
> for example (not exactly measurig toString()):
>
> +=: 546 ms
> StringBuilder, default initial capacity: 30ms
> StringBuilder, exact initial capacity: 10ms
>
> http://christian.bloggingon.net/archive/2008/09/06/performance-vorteile-bei-der-verwendung-von-stringbuilder.aspx

Such measurements are meaningless out of context.  The point is how much 
time is spent in StringBuilder _for a specific application_.

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Re: StringBuilder Stanimir Stamenkov <s7an10@netscape.net> - 2011-09-17 19:56 +0300
  Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-17 20:35 +0200
  Re: StringBuilder Roedy Green <see_website@mindprod.com.invalid> - 2011-09-17 15:34 -0700
    Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 01:33 +0200
      Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 01:56 +0200
      Re: StringBuilder Roedy Green <see_website@mindprod.com.invalid> - 2011-09-17 20:58 -0700
    Re: StringBuilder Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-09-17 22:44 -0700
      Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 09:54 +0200
        Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 09:59 +0200
        Re: StringBuilder Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-09-18 07:28 -0700
      Re: StringBuilder Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-18 08:15 -0400
        Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 15:32 +0200
          Re: StringBuilder Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-18 09:50 -0400
            Re: StringBuilder Stanimir Stamenkov <s7an10@netscape.net> - 2011-09-18 17:08 +0300
            Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 22:13 +0200
              Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 22:29 +0200
                Re: StringBuilder Jan Burse <janburse@fastmail.fm> - 2011-09-18 22:39 +0200
      Re: StringBuilder Roedy Green <see_website@mindprod.com.invalid> - 2011-09-19 09:45 -0700

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