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Fields.java
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Fields.java
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package benchmark;
import com.sun.cldchi.jvm.JVM;
class Fields {
public static int i;
public static long l;
public static float f;
public static double d;
public int I;
public long L;
public float F;
public double D;
public static void main(String[] args) {
long start = JVM.monotonicTimeMillis();
// Static Fields
for (int k = 0; k < 1000000; k++) {
i = i; i = i; i = i; i = i; i = i;
}
System.out.println("static int: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
for (int k = 0; k < 1000000; k++) {
l = l; l = l; l = l; l = l; l = l;
}
System.out.println("static long: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
for (int k = 0; k < 1000000; k++) {
f = f; f = f; f = f; f = f; f = f;
}
System.out.println("static float: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
for (int k = 0; k < 1000000; k++) {
d = d; d = d; d = d; d = d; d = d;
}
System.out.println("static double: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
// Instance Fields
Fields x = new Fields();
for (int k = 0; k < 1000000; k++) {
x.I = x.I; x.I = x.I; x.I = x.I; x.I = x.I; x.I = x.I;
}
System.out.println("int: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
for (int k = 0; k < 1000000; k++) {
x.L = x.L; x.L = x.L; x.L = x.L; x.L = x.L; x.L = x.L;
}
System.out.println("long: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
for (int k = 0; k < 1000000; k++) {
x.F = x.F; x.F = x.F; x.F = x.F; x.F = x.F; x.F = x.F;
}
System.out.println("float: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
for (int k = 0; k < 1000000; k++) {
x.D = x.D; x.D = x.D; x.D = x.D; x.D = x.D; x.D = x.D;
}
System.out.println("double: " + (JVM.monotonicTimeMillis() - start)); start = JVM.monotonicTimeMillis();
}
}