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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.     private static String stackTrace(Throwable cause) {
  11.         if (cause == null)
  12.             return "";
  13.         StringWriter sw = new StringWriter(1024);
  14.         final PrintWriter pw = new PrintWriter(sw);
  15.         cause.printStackTrace(pw);
  16.         pw.flush();
  17.         return sw.toString();
  18.     }
  19.  
  20.     private static final String STATIC_TRACE = stackTrace (new RuntimeException("Daft"));
  21.  
  22.     private static String stackString() {
  23.     	return (System.currentTimeMillis() + STATIC_TRACE);
  24.     }
  25.  
  26.     private static final long countReuse() {
  27.     	final long until = System.currentTimeMillis() + 500;
  28.     	long len = 0;
  29.     	long count = 0;
  30.     	RuntimeException except = new RuntimeException("Static");
  31.     	do {
  32.     		len += stackTrace(except).length();
  33.     		count++;
  34.     	} while (System.currentTimeMillis() < until);
  35.     	System.out.println("Reuse " + len);
  36.     	return count;
  37.     }
  38.  
  39.     private static final long countRecreate() {
  40.     	final long until = System.currentTimeMillis() + 500;
  41.     	long count = 0;
  42.     	long len = 0;
  43.     	do {
  44.     		len += stackTrace(new RuntimeException("Static")).length();
  45.     		count++;
  46.     	} while (System.currentTimeMillis() < until);
  47.     	System.out.println("Recreate " + len);
  48.     	return count;
  49.     }
  50.  
  51.     private static final long countFilled() {
  52.     	final long until = System.currentTimeMillis() + 500;
  53.     	long count = 0;
  54.     	long len = 0;
  55.     	do {
  56.     		len += stackTrace(new RuntimeException("Static").fillInStackTrace()).length();
  57.     		count++;
  58.     	} while (System.currentTimeMillis() < until);
  59.     	System.out.println("Filled " + len);
  60.     	return count;
  61.     }
  62.  
  63.     private static final long countString() {
  64.     	final long until = System.currentTimeMillis() + 500;
  65.     	long count = 0;
  66.     	long len = 0;
  67.     	do {
  68.     		len += stackString().length();
  69.     		count++;
  70.     	} while (System.currentTimeMillis() < until);
  71.     	System.out.println("Filled " + len);
  72.     	return count;
  73.     }
  74.  
  75. 	public static void main (String[] args) throws java.lang.Exception
  76. 	{
  77. 		long a = countReuse();
  78. 		long b = countRecreate();
  79. 		long c = countFilled();
  80. 		long d = countString();
  81. 		long e = countReuse();
  82. 		long f = countRecreate();
  83. 		long g = countFilled();
  84. 		long h = countString();
  85. 		System.out.printf("Warm: Reuse %d Recreate %d Filled %d String %d%nReal: Reuse %d Recreate %d Filled %d String %d%n", 
  86. 		    a,b,c,d,e,f,g,h
  87. 		);
  88. 	}
  89. }
Success #stdin #stdout 4.07s 380352KB
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stdin
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Standard input is empty
stdout
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Reuse 7379262
Recreate 4954872
Filled 4372230
Filled 40755680
Reuse 8737712
Recreate 5048680
Filled 4422822
Filled 41007680
Warm: Reuse 73062 Recreate 47643 Filled 42865 String 509446
Real: Reuse 86512 Recreate 48545 Filled 43361 String 512596
https://ideone.com/AVOrMY
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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