Comments on: Clear C# StringBuilder http://www.csharp411.com/clear-c-stringbuilder/ C# Development Fri, 03 Feb 2012 11:14:43 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: cristobal http://www.csharp411.com/clear-c-stringbuilder/#comment-895 cristobal Fri, 20 May 2011 14:01:43 +0000 http://www.csharp411.com/clear-c-stringbuilder/#comment-895 If you want to mesure time in asp.net I sugest use a StopWatch, is more acurate than un datetime.now... Stopwatch stopWatch = new Stopwatch(); stopWatch.Start(); { do something } stopWatch.Stop(); Console.WriteLine(stopWatch.ElapsedMilliseconds.ToString()); If you want to mesure time in asp.net I sugest use a StopWatch, is more acurate than un datetime.now…

Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
{
do something
}
stopWatch.Stop();
Console.WriteLine(stopWatch.ElapsedMilliseconds.ToString());

]]> By: Fernando H. Rosa http://www.csharp411.com/clear-c-stringbuilder/#comment-894 Fernando H. Rosa Mon, 28 Mar 2011 12:10:36 +0000 http://www.csharp411.com/clear-c-stringbuilder/#comment-894 Just for information of those who found this post via search engine, in .NET Framework 4.0 the StringBuilder class already have an "Clear" method. So, just call: sb.Clear() Just for information of those who found this post via search engine, in .NET Framework 4.0 the StringBuilder class already have an “Clear” method.
So, just call: sb.Clear()

]]> By: Unmesh Kondolikar http://www.csharp411.com/clear-c-stringbuilder/#comment-893 Unmesh Kondolikar Fri, 14 May 2010 12:06:12 +0000 http://www.csharp411.com/clear-c-stringbuilder/#comment-893 If you want a Clear method for more intuitive syntax you can write an extension method on the StringBuilder class and set the length to 0 in that method. If you want a Clear method for more intuitive syntax you can write an extension method on the StringBuilder class and set the length to 0 in that method.

]]> By: Michael http://www.csharp411.com/clear-c-stringbuilder/#comment-892 Michael Tue, 26 Jan 2010 00:23:15 +0000 http://www.csharp411.com/clear-c-stringbuilder/#comment-892 According to these guys: http://stackoverflow.com/questions/266923/is-using-stringbuilder-remove-method-more-memory-efficient-than-creating-a-new-st Option 2 is faster if you initialize the capacity of the new StringBuilder (to 32 in their case). According to these guys:
http://stackoverflow.com/questions/266923/is-using-stringbuilder-remove-method-more-memory-efficient-than-creating-a-new-st

Option 2 is faster if you initialize the capacity of the new StringBuilder (to 32 in their case).

]]> By: timm http://www.csharp411.com/clear-c-stringbuilder/#comment-891 timm Thu, 05 Mar 2009 01:05:40 +0000 http://www.csharp411.com/clear-c-stringbuilder/#comment-891 1. How would option 1 affect GC performance for 1M small object collection/compaction? I assume it would slow down the GC, but perhaps not enough to worry. 2. If we break through the ~85K large object size, would option 1 start fragmenting memory? By creating >85K strings? Then creating a new 85K StringBuilder object every time would definitely impact performance negatively. 1. How would option 1 affect GC performance for 1M small object collection/compaction?

I assume it would slow down the GC, but perhaps not enough to worry.

2. If we break through the ~85K large object size, would option 1 start fragmenting memory?

By creating >85K strings? Then creating a new 85K StringBuilder object every time would definitely impact performance negatively.

]]> By: Alex http://www.csharp411.com/clear-c-stringbuilder/#comment-890 Alex Thu, 05 Mar 2009 00:47:17 +0000 http://www.csharp411.com/clear-c-stringbuilder/#comment-890 1. How would option 1 affect GC performance for 1M small object collection/compaction? 2. If we break through the ~85K large object size, would option 1 start fragmenting memory? 1. How would option 1 affect GC performance for 1M small object collection/compaction?

2. If we break through the ~85K large object size, would option 1 start fragmenting memory?

]]> By: Me http://www.csharp411.com/clear-c-stringbuilder/#comment-889 Me Mon, 09 Feb 2009 10:17:04 +0000 http://www.csharp411.com/clear-c-stringbuilder/#comment-889 The difference is even smaller with faster PC's. My results for 1M (your code): new = 00:00:02.3437500, append = 00:00:01.9843750 So, while Option 2 is faster, nobody is really going to notice it anyway. The difference is even smaller with faster PC’s. My results for 1M (your code):
new = 00:00:02.3437500, append = 00:00:01.9843750

So, while Option 2 is faster, nobody is really going to notice it anyway.

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