Performance difference between String and StringBuilder : StringBuilder « Data Type « VB.Net Tutorial

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VB.Net Tutorial » Data Type » StringBuilder

2. 38. 13. Performance difference between String and StringBuilder


 

 



Imports System.Text

 

public class Test



   public Shared Sub Main

        Const ADD_STRING As String = "1234567890"

        Dim num_trials As Long = 1000

        Dim start_time As DateTime

        Dim stop_time As DateTime

        Dim elapsed_time As TimeSpan

        Dim txt As String

        Dim string_builder As New StringBuilder



        txt = ""

        start_time = Now

        For i As Long = 1 To num_trials

            txt = txt & ADD_STRING

        Next i

        stop_time = Now

        elapsed_time = stop_time.Subtract(start_time)

        Console.WriteLine(elapsed_time.TotalSeconds.ToString("0.000000"))



        txt = ""

        start_time = Now

        For i As Long = 1 To num_trials

            string_builder.Append(ADD_STRING)

        Next i

        txt = string_builder.ToString()

        stop_time = Now

        elapsed_time = stop_time.Subtract(start_time)

        Console.WriteLine(elapsed_time.TotalSeconds.ToString("0.000000"))



   End Sub



End class

2. 38. StringBuilder
	2. 38. 1.	Demonstrating StringBuilder class constructors
	2. 38. 2.	StringBuilder: Insert string, Append and Replace
	2. 38. 3.	Append Char to StringBuilder
	2. 38. 4.	Demonstrating StringBuilder Append methods
	2. 38. 5.	StringBuilder AppendFormat
	2. 38. 6.	StringBuilder.AppendFormat: {0:D} is ${1: #,###.00}
	2. 38. 7.	StringBuilder: Length, Capacity, EnsureCapacity
	2. 38. 8.	Use StringBuilder Indexer
	2. 38. 9.	Demonstrating methods Insert and Remove of the StringBuilder class
	2. 38. 10.	Demonstrating method Replace
	2. 38. 11.	Use StringBuilder to reverse a string
	2. 38. 12.	StringBuilder.ToStrings
	2. 38. 13.	Performance difference between String and StringBuilder

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