fork download
copy 
  1.  
  2. import java.util.*;
  3. import java.lang.*;
  4.  
  5. class Main
  6. {
  7.         public static void main (String[] args) throws java.lang.Exception
  8.         {
  9.                 new Main();
  10.         }
  11.  
  12.         public Main() {
  13.  
  14.         	long a = System.currentTimeMillis();
  15.             int n = 0;
  16.                 for (int i=0; i<1000000; i++) {
  17.                  synchronized(this) {
  18.                   n += 5*5;
  19.                  }
  20.                 }
  21.                 System.out.println("1M computations: " + (System.currentTimeMillis()-a)/1000D+"s");
  22.  
  23.                 a = System.currentTimeMillis();
  24.                 synchronized(this) {
  25.                  for (int i=0; i<1000000; i++) {
  26.                   n += 5*5;
  27.                  }
  28.                 }
  29.                 System.out.println("1M synchronized code blocks: " + (System.currentTimeMillis()-a)/1000D+"s");
  30.  
  31.                 a = System.currentTimeMillis();
  32.                 n = 0;
  33.                  for (int i=0; i<1000000; i++) {
  34.                   n += poti();
  35.                 }
  36.                 System.out.println("1M synchronized method calls: " + (System.currentTimeMillis()-a)/1000D+"s");
  37.         }
  38.  
  39.         public synchronized int poti()
  40.         {
  41.         	return 5*5;
  42.         }
  43. }
  44.  
Success #stdin #stdout 0.08s 245760KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1M computations: 0.027s
1M synchronized code blocks: 0.0010s
1M synchronized method calls: 0.024s
https://ideone.com/yC8SO
language:
Java (HotSpot 12)
created:
13 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!